Investment Risks |
Jul. 29, 2026 |
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | The Fund has characteristics unlike traditional investment products and may not be suitable for all investors. Although the Fund seeks to achieve the Outcomes consistent with its investment objective, there is no guarantee that it will do so. An investment in the Fund may not be appropriate for investors who do not intend to hold Fund shares for the entire Outcome Period. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund (either directly or through its exposure to the Underlying ETF) is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including (for purposes of these risks references to the Fund include, as appropriate, references to the Underlying ETF):
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Buffered Loss Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Buffered Loss Risk. There can be no guarantee that the Fund will be successful in its strategy to provide protection against 90% of decreases in the total return of the Underlying ETF over the duration of the Outcome Period. If an investor purchases shares after the beginning of the Outcome Period or sells shares prior to the end of the Outcome Period, the Buffer that the Fund seeks to provide may not be effective. If an investor purchases shares at a time during an Outcome Period when the total return of the Underlying ETF has already increased, then the investor will incur losses notwithstanding the Buffer since the Buffer only seeks to protect against declines in the total return of the Underlying ETF from the beginning of the Outcome Period. If the options (and therefore the Buffer) do not perform as expected, an investor may experience significant losses, including the investor’s entire investment.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Capped Upside Return Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Capped Upside Return Risk. Even if the total return of the Underlying ETF exceeds the Cap for the Outcome Period, the Fund will not appreciate beyond the Cap. Due to the Cap, the Fund may significantly underperform the Underlying ETF over the course of the Outcome Period. If an investor purchases shares of the Fund after the beginning of the Outcome Period and Fund shares have appreciated close to the Cap, there may be little or no ability for that investor to experience an investment gain on their shares yet such investor is exposed to potential losses between the appreciated share price and the Fund’s NAV at the commencement of the Outcome Period. Further, because the options are expected to produce returns that match the total return of the Underlying ETF (subject to the Cap) on the last day of the Outcome Period, if an investor sells shares prior to that day, such investor may sell at a price that does not reflect the total return of the Underlying ETF and may sell at a price when the Fund has underperformed the Underlying ETF.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Options Risk. An option is a contract that gives the purchaser (holder) of the option, in return for a premium, the right to buy from (call) or sell to (put) the seller (writer) of the option the security or currency underlying the option at a specified exercise price at any time during the term of the option (normally not exceeding nine months). The writer of an option has the obligation upon exercise of the option by its purchaser to deliver the underlying security or currency upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security or currency. Options are derivatives, which, as described above, can be illiquid and can imperfectly correlate with the reference asset(s).
The use of options involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by the time remaining until the expiration of the option contract, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors.
Any FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Options Income Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Options Income Risk. The Fund generates option premium income generated from the sale of options (“option income”). This option income generally is classified as a return of capital for financial accounting purposes, which is how such income is required to be reported on the 19(a) notices that the Fund is required to issue after its monthly distributions. However, the 19(a) notices do not reflect the tax character of the option income, which is determined after the end of the calendar year. The option income for tax purposes is likely to be considered taxable investment income and may not reduce your tax basis in your shares of the Fund when distributed.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | O C C Resetting Strike Prices Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | OCC Resetting Strike Prices Risk. Subject to determination by the Securities Committee of the OCC, adjustments may be made to the Fund’s options for certain events (collectively, “Corporate Actions”) specified in the OCC’s bylaws and rules such as: certain stock dividends or distributions, stock splits, reverse stock splits, rights offerings, distributions, reorganizations, recapitalizations, or reclassifications with respect to an underlying security, or a merger, consolidation, dissolution or liquidation of the issuer of the underlying security. According to the OCC’s by-laws, the nature and extent of any such adjustment is to be determined by the OCC’s Securities Committee, in light of the circumstances known to it at the time such determination is made, based on its judgment as to what is appropriate for the protection of investors and the public interest, taking into account such factors as fairness to holders and writers (or purchasers and sellers) of the affected options, the maintenance of a fair and orderly market in the affected options, consistency of interpretation and practice, efficiency of exercise settlement procedures, and the coordination with other clearing agencies of the clearance and settlement of transactions in the underlying interest. If the OCC’s Securities Committee determines that a Corporate Action warrants an adjustment to the strike price of the Fund’s options, the Fund’s Buffer and Cap will be adjusted accordingly and will differ from amount set at the beginning of the Outcome Period. There is no guarantee that the options will be adjusted.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Clearing Member Default Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Clearing Member Default Risk. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The OCC acts as guarantor and central counterparty with respect to the options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected options positions, both of which would impair the Fund’s ability to execute its investment strategy. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Outcome Period Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Outcome Period Risk. The Fund seeks to deliver returns that match those of the Underlying ETF’s total return if shares are held by an investor from the beginning of the Outcome Period. In the event an investor purchases shares after the beginning of the Outcome Period or sells shares prior to the end of the Outcome Period, the returns realized by the investor should not be expected to match those that the Fund seeks to provide. Further, because the Fund utilizes an Outcome Period that is approximately two years long, the risk of experiencing non-correlated returns is exacerbated.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Upside Participation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Upside Participation Risk. There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with the total return of the Underlying ETF’s shares over the Outcome Period prior to taking into account any fees or expenses, subject to the maximum total return imposed by the Cap. In the event an investor purchases shares after the beginning of the Outcome Period or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. In order to finance the downside protection offered by the Buffer, the Fund enters into a sold call option contract which limits its upside potential. Since the Buffer seeks to provide protection against 90% of decreases in the total return of the Underlying ETF over the duration of the Outcome Period, the Cap may be lower than the caps imposed by other ETFs that utilize defined outcome investing strategies with different buffers, on a relative basis. Due to the Cap, the Fund may significantly underperform the Underlying ETF over the course of the Outcome Period. Finally, the Fund’s Cap is dependent upon market conditions at the commencement of the new Outcome Period. In certain market conditions, the Fund’s Cap may provide relatively low upside potential, which may cause the Fund to further underperform the Underlying ETF over the course of an Outcome Period.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Cap Change Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cap Change Risk. In addition, since the Fund invests in the Underlying ETF, the Fund will receive distributions made by the Underlying ETF. These distributions paid by the Underlying ETF may cause the OCC to make adjustments to the strike price of the Fund’s options. If this occurs, then such an adjustment can cause changes to the Fund’s Buffer and Cap and may adversely affect the Outcomes. As a result, the Fund may not perform as expected and Fund shareholders could be adversely impacted, especially Fund shareholders that purchase shares after the start of the Outcome Period and Fund shareholders who do not hold shares for the entire Outcome Period. A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Non Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Correlation Risk. The FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Conflict Of Interest Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Conflict of Interest Risk. Because the Fund and the Underlying ETF are both managed by Krane, Krane is subject to conflicts of interest relating to the management of the Fund and Underlying ETF including the fair valuation of the Underlying ETF’s securities. Any fair valuation decisions made by Krane regarding securities held by the Underlying ETF impact the secondary market share price of the Underlying ETF and may impact the pricing of the options held by the Fund.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on the Adviser’s success or failure to implement investment strategies for the Fund. The Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
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| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 90% KWEB Defined Outcome January 2027 ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 100% KWEB Defined Outcome January 2027 ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | The Fund has characteristics unlike traditional investment products and may not be suitable for all investors. Although the Fund seeks to achieve the Outcomes consistent with its investment objective, there is no guarantee that it will do so. An investment in the Fund may not be appropriate for investors who do not intend to hold Fund shares for the entire Outcome Period. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund (either directly or through its exposure to the Underlying ETF) is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including (for purposes of these risks references to the Fund include, as appropriate, references to the Underlying ETF):
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Buffered Loss Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Buffered Loss Risk. There can be no guarantee that the Fund will be successful in its strategy to provide protection against 100% of decreases in the total return of the Underlying ETF over the duration of the Outcome Period. If an investor purchases shares after the beginning of the Outcome Period or sells shares prior to the end of the Outcome Period, the Buffer that the Fund seeks to provide may not be effective. If an investor purchases shares at a time during an Outcome Period when the total return of the Underlying ETF has already increased, then the investor will incur losses notwithstanding the Buffer since the Buffer only seeks to protect against declines in the total return of the Underlying ETF from the beginning of the Outcome Period. If the options (and therefore the Buffer) do not perform as expected, an investor may experience significant losses, including the investor’s entire investment.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Capped Upside Return Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Capped Upside Return Risk. Even if the total return of the Underlying ETF exceeds the Cap for the Outcome Period, the Fund will not appreciate beyond the Cap. Due to the Cap, the Fund may significantly underperform the Underlying ETF over the course of the Outcome Period. If an investor purchases shares of the Fund after the beginning of the Outcome Period and Fund shares have appreciated close to the Cap, there may be little or no ability for that investor to experience an investment gain on their shares yet such investor is exposed to potential losses between the appreciated share price and the Fund’s NAV at the commencement of the Outcome Period. Further, because the options are expected to produce returns that match the total return of the Underlying ETF (subject to the Cap) on the last day of the Outcome Period, if an investor sells shares prior to that day, such investor may sell at a price that does not reflect the total return of the Underlying ETF and may sell at a price when the Fund has underperformed the Underlying ETF.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Options Risk. An option is a contract that gives the purchaser (holder) of the option, in return for a premium, the right to buy from (call) or sell to (put) the seller (writer) of the option the security or currency underlying the option at a specified exercise price at any time during the term of the option (normally not exceeding nine months). The writer of an option has the obligation upon exercise of the option by its purchaser to deliver the underlying security or currency upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security or currency. Options are derivatives, which, as described above, can be illiquid and can imperfectly correlate with the reference asset(s).
The use of options involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by the time remaining until the expiration of the option contract, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors.
Any FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | O C C Resetting Strike Prices Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | OCC Resetting Strike Prices Risk. Subject to determination by the Securities Committee of the OCC, adjustments may be made to the Fund’s options for certain events (collectively, “Corporate Actions”) specified in the OCC’s bylaws and rules such as: certain stock dividends or distributions, stock splits, reverse stock splits, rights offerings, distributions, reorganizations, recapitalizations, or reclassifications with respect to an underlying security, or a merger, consolidation, dissolution or liquidation of the issuer of the underlying security. According to the OCC’s by-laws, the nature and extent of any such adjustment is to be determined by the OCC’s Securities Committee, in light of the circumstances known to it at the time such determination is made, based on its judgment as to what is appropriate for the protection of investors and the public interest, taking into account such factors as fairness to holders and writers (or purchasers and sellers) of the affected options, the maintenance of a fair and orderly market in the affected options, consistency of interpretation and practice, efficiency of exercise settlement procedures, and the coordination with other clearing agencies of the clearance and settlement of transactions in the underlying interest. If the OCC’s Securities Committee determines that a Corporate Action warrants an adjustment to the strike price of the Fund’s options, the Fund’s Buffer and Cap will be adjusted accordingly and will differ from amount set at the beginning of the Outcome Period. There is no guarantee that the options will be adjusted.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Clearing Member Default Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Clearing Member Default Risk. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The OCC acts as guarantor and central counterparty with respect to the options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected options positions, both of which would impair the Fund’s ability to execute its investment strategy. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Outcome Period Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Outcome Period Risk. The Fund seeks to deliver returns that match those of the Underlying ETF’s total return if shares are held by an investor from the beginning of the Outcome Period. In the event an investor purchases shares after the beginning of the Outcome Period or sells shares prior to the end of the Outcome Period, the returns realized by the investor should not be expected to match those that the Fund seeks to provide. Further, because the Fund utilizes an Outcome Period that is approximately two years long, the risk of experiencing non-correlated returns is exacerbated.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Upside Participation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Upside Participation Risk. There can be no guarantee that the Fund will be successful in its strategy to provide shareholders with the total return of the Underlying ETF’s shares over the Outcome Period prior to taking into account any fees or expenses, subject to the maximum total return imposed by the Cap. In the event an investor purchases shares after the beginning of the Outcome Period or does not stay invested in the Fund for the entirety of the Outcome Period, the returns realized by such investor may not match those that the Fund seeks to achieve. In order to finance the downside protection offered by the Buffer, the Fund enters into a sold call option contract which limits its upside potential. Since the Buffer seeks to provide protection against 100% of decreases in the total return of the Underlying ETF over the duration of the Outcome Period, the Cap may be lower than the caps imposed by other ETFs that utilize defined outcome investing strategies with different buffers, on a relative basis. Due to the Cap, the Fund may significantly underperform the Underlying ETF over the course of the Outcome Period. Finally, the Fund’s Cap is dependent upon market conditions at the commencement of the new Outcome Period. In certain market conditions, the Fund’s Cap may provide relatively low upside potential, which may cause the Fund to further underperform the Underlying ETF over the course of an Outcome Period.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Cap Change Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cap Change Risk. In addition, since the Fund invests in the Underlying ETF, the Fund will receive distributions made by the Underlying ETF. These distributions paid by the Underlying ETF may cause the OCC to make adjustments to the strike price of the Fund’s options. If this occurs, then such an adjustment can cause changes to the Fund’s Buffer and Cap and may adversely affect the Outcomes. As a result, the Fund may not perform as expected and Fund shareholders could be adversely impacted, especially Fund shareholders that purchase shares after the start of the Outcome Period and Fund shareholders who do not hold shares for the entire Outcome Period. A new Cap is established at the beginning of each Outcome Period and is dependent on prevailing market conditions at the time the Cap is established. As such, the Cap may rise or fall from one Outcome Period to the next and is unlikely to remain the same for consecutive Outcome Periods.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Non Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Correlation Risk. The FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Conflict Of Interest Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Conflict of Interest Risk. Because the Fund and the Underlying ETF are both managed by Krane, Krane is subject to conflicts of interest relating to the management of the Fund and Underlying ETF including the fair valuation of the Underlying ETF’s securities. Any fair valuation decisions made by Krane regarding securities held by the Underlying ETF impact the secondary market share price of the Underlying ETF and may impact the pricing of the options held by the Fund.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on the Adviser’s success or failure to implement investment strategies for the Fund. The Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Option Income Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Option Income Risk. The Fund generates option premium income generated from the sale of options (“option income”). This option income generally is classified as a return of capital for financial accounting purposes, which is how such income is required to be reported on the 19(a) notices that the Fund is required to issue after its monthly distributions. However, the 19(a) notices do not reflect the tax character of the option income, which is determined after the end of the calendar year. The option income for tax purposes is likely to be considered taxable investment income and may not reduce your tax basis in your shares of the Fund when distributed.
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| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 100% KWEB Defined Outcome January 2027 ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Asia Pacific High Income USD Bond ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Asia Pacific High Income USD Bond ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Asia Pacific High Income USD Bond ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Asia Pacific High Income USD Bond ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Asia Pacific High Income USD Bond ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Asia Pacific High Income USD Bond ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Asia Pacific High Income USD Bond ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Asia Pacific High Income USD Bond ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Asia Pacific High Income USD Bond ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Asia Pacific High Income USD Bond ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Asia Pacific High Income USD Bond ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Asia Pacific High Income USD Bond ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on the Sub-Adviser’s success or failure to implement investment strategies for the Fund. The Sub-Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares Asia Pacific High Income USD Bond ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Asia Pacific High Income USD Bond ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Asia Pacific High Income USD Bond ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Asia Pacific High Income USD Bond ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Asia Pacific High Income USD Bond ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Asia Pacific High Income USD Bond ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Asia Pacific High Income USD Bond ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Asia Pacific High Income USD Bond ETF | Asia Pacific Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Asia-Pacific Risk. Investments in securities of issuers in Asia-Pacific countries involve risks that are specific to the Asia-Pacific region, including certain legal, regulatory, political and economic risks, including high interest rates, economic volatility, inflation, currency devaluations and high unemployment rates. Certain Asia-Pacific countries have experienced expropriation and/or nationalization of assets, confiscatory taxation, political instability, armed conflict and social instability as a result of religious, ethnic, socio-economic and/or political unrest. Political instability could have an adverse effect on economic or social conditions in these economies and may result in outbreaks of civil unrest, terrorist attacks or threats or acts of war in the affected areas, any of which could adversely affect the Fund. Some economies in this region are dependent on a range of commodities, and are strongly affected by international commodity prices and particularly vulnerable to price changes for these products. The market for securities in this region may also be directly influenced by the flow of international capital, and by the economic and market conditions of neighboring countries. Many Asia-Pacific economies have experienced rapid growth and industrialization, and there is no assurance that this growth rate will be maintained. Some Asia-Pacific economies are highly dependent on trade and economic conditions in other countries can impact these economies. Singapore, Malaysia, Thailand, Indonesia and the Philippines present different economic and political conditions from those in Western markets.
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| KraneShares Asia Pacific High Income USD Bond ETF | High Yield And Unrated Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Yield and Unrated Securities Risk. Securities that are unrated or rated below investment grade (or “junk bonds”) are subject to greater risk of loss of income and principal than highly rated securities because their issuers may be more likely to default. Junk bonds are inherently speculative. The prices of unrated and high yield securities are likely to be more volatile than those of highly rated securities, and the secondary market for them is generally less liquid than that for highly rated securities.
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| KraneShares Asia Pacific High Income USD Bond ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares Asia Pacific High Income USD Bond ETF | Regulation S Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Regulation S Securities Risk. Regulation S securities may be less liquid than publicly traded securities as a result of legal or contractual restrictions on resale. Regulation S securities may be resold in privately negotiated transactions, but the price realized in such resales could be less than the amount originally paid. Further, because Regulation S securities are not publicly traded, they may not be subject to the same disclosure and other investor protection requirements that would be applicable to publicly traded securities. As a result, Regulation S securities may involve a high degree of business and financial risk and may result in losses.
Regulation S securities of U.S. and non-U.S. issuers are offered through private offerings without registration with the SEC pursuant to Regulation S of the Securities Act of 1933. Offerings of Regulation S securities may be conducted outside of the United States, and Regulation S securities may be relatively less liquid as a result of legal or contractual restrictions on resale. Although Regulation S securities may be resold in privately negotiated transactions, the price realized from these sales could be less than that originally paid by the Fund. Further, companies whose securities are not publicly traded may not be subject to the disclosure and other investor protection requirements that would be applicable if their securities were publicly traded. Accordingly, Regulation S securities may involve a high degree of business and financial risk and may result in substantial losses.
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| KraneShares Asia Pacific High Income USD Bond ETF | Convertible Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Convertible Securities Risk. The value of a convertible security, which is a form of hybrid security (i.e., a security with both debt and equity characteristics), typically increases or decreases with the price of the underlying common stock. In general, a convertible security is subject to the market risks of stocks when the underlying stock’s price is high relative to the conversion price and is subject to the market risks of debt securities when the underlying stock’s price is low relative to the conversion price. The general market risks of debt securities that are common to convertible securities include, but are not limited to, interest rate risk and credit risk. Many convertible securities have credit ratings that are below investment grade and are subject to the same risks as an investment in lower-rated debt securities. To the extent the Fund invests in convertible securities issued by small- or mid-capitalization companies, it will be subject to the risks of investing in such companies
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| KraneShares Asia Pacific High Income USD Bond ETF | Real Estate Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Real Estate Sector Risk. The Fund may invest in securities within the real estate sector. Investments in real estate issuers may be volatile. Real estate issuers are susceptible to the risks associated with direct ownership of real estate, including declines in the real estate market, decreases in property revenues, increases in interest rates, increases in property taxes and operating expenses, legal and regulatory changes, a lack of credit or capital, defaults by borrowers or tenants, environmental problems and natural disasters.
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| KraneShares Asia Pacific High Income USD Bond ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Asia Pacific High Income USD Bond ETF | Sovereign And Quasi Sovereign Debt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Sovereign and Quasi-Sovereign Debt Risk. The governmental authority that controls the repayment of sovereign and quasi-sovereign debt may be unwilling or unable to repay the principal and/or interest when due including due to the extent of its foreign reserves, the availability of sufficient foreign exchange, the relative size of the debt service burden to the economy as a whole, the debtor’s policy towards the International Monetary Fund, and the political constraints to which the debtor is subject. If an issuer of government or quasi-government debt defaults on payments of principal and/or interest, the Fund may have limited legal recourse against the issuer and/or guarantor. During periods of economic uncertainty, the market prices of sovereign and quasi-sovereign bonds may be more volatile and result in losses. In the past, certain governments of emerging market countries have declared themselves unable to meet their financial obligations on a timely basis, which has resulted in losses for investors.
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| KraneShares Asia Pacific High Income USD Bond ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Portfolio Turnover Risk. The Fund may incur a high portfolio turnover rate, which may increase the Fund’s brokerage commission costs, generate net short-term capital gains and negatively impact the Fund’s performance. Regulations require that the portfolio turnover rate be calculated without regard to trades of short-term cash instruments, in-kind transactions or derivatives transactions, which may comprise a significant portion of the Fund’s trading. If such trades were reflected, the calculated portfolio turnover rate may be significantly higher.
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| KraneShares Asia Pacific High Income USD Bond ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Asia Pacific High Income USD Bond ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Bosera MSCI China A 50 Connect Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Bosera’s security selection process may not produce the intended results.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Consumer Staples Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Staples Sector Risk. Companies in the consumer staples sector may be affected by general economic conditions, commodity production and pricing, consumer confidence and spending, consumer preferences, interest rates, and product cycles. They are subject to government regulation affecting their products which may negatively impact such companies’ performance. For instance, for food and beverage companies, government regulations may affect the permissibility of using various food additives and production methods, which could affect company profitability. In particular, tobacco companies may be adversely affected by the adoption of proposed legislation and/or by litigation. Food and beverage companies risk further loss of market share and revenue due to contamination and resulting product recalls. Also, the success of food, beverage, household and personal products may be strongly affected by fads, marketing campaigns, changes in commodity prices and other factors affecting supply and demand.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Mid-Capitalization Company Risk. Investing in the securities of medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Bosera MSCI China A 50 Connect Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Bosera MSCI China A 50 Connect Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares California Carbon Allowance Strategy ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares California Carbon Allowance Strategy ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting
in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares California Carbon Allowance Strategy ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
California Risk. Because the Fund is exposed to carbon credits issued under the California Carbon Allowance “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting California. For example, natural disasters may disrupt the local, state or regional economy or certain sectors of the economy and may impact the prices of such carbon credit futures. California’s budget and fiscal operations face certain structural impediments and rely on revenue sources which have been historically sensitive to the economic environment. California’s diverse economy is the largest in the United States and one of the largest in the world with major components including high technology, trade, entertainment, manufacturing, tourism, construction, agriculture and services. Any downturn in these sectors or related industries may adversely affect the economy of the state and the prices of such carbon credit futures.
Quebec Risk. Because the Fund is exposed to carbon credits issued under the California Carbon Allowance “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting Quebec. Quebec is a province in Canada, which has a separatist party whose objective is to achieve sovereignty and increased self-governing legal and financial powers. In addition, the Canadian market, including Quebec, is relatively concentrated in issuers involved in the production and distribution of natural resources such as forest products, metals, agricultural products, and energy related products like oil, gas, and hydroelectricity. Accordingly, any downturn in these sectors or related industries may adversely affect the economy of Canada and Quebec and the prices of such carbon credit futures.
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| KraneShares California Carbon Allowance Strategy ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares California Carbon Allowance Strategy ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares California Carbon Allowance Strategy ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares California Carbon Allowance Strategy ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares California Carbon Allowance Strategy ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Index and may hold less than the total number of investments in the Index. Therefore, the Fund is subject to the risk that Krane’s investment selection process may not produce the intended results.
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| KraneShares California Carbon Allowance Strategy ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares California Carbon Allowance Strategy ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares California Carbon Allowance Strategy ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares California Carbon Allowance Strategy ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
The Fund intends to treat its income from the Subsidiary and from index-linked structured notes as qualifying income. Income tax regulations on which taxpayers may rely for taxable years beginning after September 28, 2016, and other guidance provided by the IRS at the time of the introduction of such regulations, support that treatment, although there is no guidance directly addressing the status of such structured notes as securities. The tax treatment of the Fund’s investment in the Subsidiary or in such index-linked structured notes, however, may be adversely affected by future legislation, court decisions, Treasury Regulations and/or guidance issued by the IRS that could affect whether income derived from such investments is “qualifying income” under Subchapter M of the Internal Revenue Code, or otherwise affect the character, timing and/or amount of the Fund’s taxable income or any gains or distributions made by the Fund.
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| KraneShares California Carbon Allowance Strategy ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares California Carbon Allowance Strategy ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares California Carbon Allowance Strategy ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares California Carbon Allowance Strategy ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares California Carbon Allowance Strategy ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares California Carbon Allowance Strategy ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Index. This may be due to, among other factors, the Fund investments in carbon credit futures with different maturity dates, the Fund weighing the carbon credit futures differently than the Index, and the Fund’s purchase of carbon credit futures on different dates than the rebalancing date for the Index. To the extent that the Fund invests in other instruments that are consistent with its investment objective, such as futures contracts that are not carbon credit futures, options on futures contracts, swap contracts, and other investment companies and notes, the Fund’s ability to track the Index may be adversely affected.
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| KraneShares California Carbon Allowance Strategy ETF | Carbon Emission Allowance And Cap And Trade Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Carbon Emission Allowance and Cap and Trade Risk. There is no assurance that cap and trade regimes will continue to exist. Cap and trade was designed to attempt to put a cap on pollution by putting a price on carbon emissions, but the approach may not prove to be an effective method of reduction in GHG emissions and or in achieving climate change objectives; and depending on the political climate globally, climate change concerns may be ignored or abandoned. As a result or due to other factors, cap and trade regimes may be terminated or may not be renewed upon their expiration. New technologies may arise that may diminish or eliminate the need for cap and trade markets. Ultimately, the cost of emissions credits is determined by the cost of actually reducing emissions levels. If the price of credits becomes too high, it will be more economical for companies to develop or invest in green technologies, thereby suppressing the demand for credits and adversely affect the Fund.
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| KraneShares California Carbon Allowance Strategy ETF | Regulatory Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Regulatory Risk. The Fund is subject to the risk that a change in U.S. law and related regulations will impact the way the Fund operates, increase the particular costs of the Fund’s operations and/or change the competitive landscape. Additional legislative or regulatory changes could occur that may materially and adversely affect the Fund.
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| KraneShares California Carbon Allowance Strategy ETF | Subsidiary Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Subsidiary Investment Risk. By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. Since the Subsidiary is organized under the law of the Cayman Islands and is not registered with the SEC under the Investment Company Act of 1940, as amended (the “1940 Act”), the Fund will not receive all of the protections offered to shareholders of registered investment companies. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as intended, which may negatively affect the Fund and its shareholders.
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| KraneShares California Carbon Allowance Strategy ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares California Carbon Allowance Strategy ETF | Futures Contract Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Futures Contract Risk. Successful use of futures contracts draws upon the Adviser’s or Sub-Adviser’s skill and experience with respect to such instruments and is subject to special risk considerations. The primary risks associated with the use of futures contracts include: (a) an imperfect correlation between the change in market value of the reference asset and the price of the futures contract; (b) possible lack of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses caused by unanticipated market movements, which are potentially unlimited; and (d) the inability to predict correctly the direction of market prices, interest rates, currency exchange rates and other economic factors. When the Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial. If the Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous.
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| KraneShares California Carbon Allowance Strategy ETF | Commodity And Commodity Linked Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Commodity and Commodity-Linked Derivatives Risk. The Fund, directly or indirectly, may have significant investment exposure to the commodities markets and/or a particular sector of the commodities markets, which may subject it to greater volatility than investments in traditional securities. The commodities markets are impacted by a variety of factors, including market movements, resource availability, commodity price volatility, speculation in the commodities markets, domestic and foreign political and economic events and policies, trade policies and tariffs, war, acts of terrorism, changes in domestic or foreign interest rates and/or investor expectations concerning interest rates, domestic and foreign inflation rates and investment and trading activities in commodities. The value of a commodity-linked derivative investment typically is based upon the price movements of a physical commodity and may be affected by these same factors as well as credit and interest rate risks. In addition, investments in commodity-linked derivatives may be subject to greater volatility than non-derivative based investments.
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| KraneShares California Carbon Allowance Strategy ETF | Commodity Pool Registration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Commodity Pool Registration Risk. Under regulations promulgated by the CFTC, the Fund and the Subsidiary are considered commodity pools, and therefore each is subject to regulation under the Commodity Exchange Act and CFTC rules. Krane and MLIA are registered as a commodity pool operator and commodity trading adviser, respectively, and manages the Fund and the Subsidiary in accordance with CFTC rules, as well as the rules that apply to registered investment companies. Commodity pools are subject to additional laws, regulations and enforcement policies, all of which may potentially increase compliance costs and may affect the operations and financial performance of the Fund and the Subsidiary. Additionally, positions in futures and other contracts may have to be liquidated at disadvantageous times or prices to prevent the Fund from exceeding any applicable position limits established by the CFTC. Such actions may subject the Fund to substantial losses.
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| KraneShares California Carbon Allowance Strategy ETF | Energy Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Energy Sector Risk. Investments in, and/or exposure to, the energy sector, which includes energy commodities such as oil, gasoline, and carbon credits, may be highly volatile and can change quickly and unpredictably due to a number of factors, including the legislative or regulatory changes, adverse market conditions, increased competition affecting the energy sector, financial, accounting and tax matters and other events that the Fund cannot control. In addition, the value of energy commodities may fluctuate widely due to changes in supply and demand.
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| KraneShares California Carbon Allowance Strategy ETF | U S Government Obligations Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect the Fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. Additionally, market prices and yields of securities supported by the full faith and credit of the U.S. government may decline or be negative for short or long periods of time.
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| KraneShares California Carbon Allowance Strategy ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares California Carbon Allowance Strategy ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares California Carbon Allowance Strategy ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Alpha Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares China Alpha Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares China Alpha Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares China Alpha Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares China Alpha Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares China Alpha Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares China Alpha Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares China Alpha Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares China Alpha Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares China Alpha Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares China Alpha Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares China Alpha Index ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares China Alpha Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares China Alpha Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares China Alpha Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares China Alpha Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares China Alpha Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares China Alpha Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares China Alpha Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares China Alpha Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares China Alpha Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares China Alpha Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares China Alpha Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares China Alpha Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares China Alpha Index ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Portfolio Turnover Risk. The Fund may incur a high portfolio turnover rate, which may increase the Fund’s brokerage commission costs, generate net short-term capital gains and negatively impact the Fund’s performance. Regulations require that the portfolio turnover rate be calculated without regard to trades of short-term cash instruments, in-kind transactions or derivatives transactions, which may comprise a significant portion of the Fund’s trading. If such trades were reflected, the calculated portfolio turnover rate may be significantly higher.
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| KraneShares China Alpha Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares China Alpha Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares China Alpha Index ETF | Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Mid-Capitalization Company Risk. Investing in the securities of medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares China Alpha Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares China Alpha Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares China Alpha Index ETF | Machine Learning And Data Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Machine Learning and Data Risk. Machine learning is a subset of artificial intelligence that focuses on developing algorithms and statistical models through learning and improving their performance from data and experiences automatically without being explicitly programmed. The Underlying Index uses a machine learning model, the output of which is heavily dependent on multiple inputs, including current and historical data and information (collectively, “Data”). To the extent the machine learning process does not perform as designed or as intended, the Fund’s strategy may not be successfully implemented, and the Fund may lose value. If the News Sources are incorrect, incomplete or unreliable, any decisions made in reliance thereon may lead to the inclusion or exclusion of securities that would have been excluded or included had the information not contained such flaws.
Machine learning models can be prone to overfitting (or performing exceptionally well on historical data used to train and test the model but failing to generalize to new data), leading to poor performance in real-world applications. Machine learning models can also be sensitive to market conditions. The Underlying Index may be adversely impacted if the machine learning models used to compose it are unprepared to or unable to digest unanticipated market circumstances, such as extreme market events. All of these factors may cause the Underlying Index to not perform as intended and adversely impact the Fund
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| KraneShares China Alpha Index ETF | Non Diversified Fund Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares China Alpha Index ETF | Materials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Materials Sector Risk. The materials sector includes companies from the following and similar industries: chemicals; metals & mining; paper & forest products; containers & packaging; and construction materials. Many companies in the materials sector are significantly affected by the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, environmental policies and consumer demand. At times, worldwide production of industrial materials has exceeded demand as a result of over-building or economic downturns, leading to poor investment returns or losses. Other risks may include liability for environmental damage and general civil liabilities, depletion of resources, and mandated expenditures for safety and pollution control. The materials sector may also be affected by economic cycles, technical progress, labor relations, and government regulations.
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| KraneShares China Alpha Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Alpha Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Alpha Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Technology & Semiconductor STAR 50 Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Bosera’s security selection process may not produce the intended results.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Portfolio Turnover Risk. The Fund may incur a high portfolio turnover rate, which may increase the Fund’s brokerage commission costs, generate net short-term capital gains and negatively impact the Fund’s performance. Regulations require that the portfolio turnover rate be calculated without regard to trades of short-term cash instruments, in-kind transactions or derivatives transactions, which may comprise a significant portion of the Fund’s trading. If such trades were reflected, the calculated portfolio turnover rate may be significantly higher.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Healthcare Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Healthcare Sector Risk. The profitability of companies in the healthcare sector may be affected by government regulations and government healthcare programs, government reimbursement for medical expenses, increases or decreases in the cost of medical products and services, limited product lines, increased emphasis on the delivery of healthcare through outpatient services and product liability claims. Many healthcare companies are heavily dependent on patent protection, which may be time consuming and costly, and the expiration of a company’s patent may adversely affect that company’s profitability. Healthcare companies are subject to competitive forces that may result in pricing pressure, including price discounting, and may be thinly capitalized and susceptible to product obsolescence. Many new products in the healthcare sector require significant research and development and may be subject to regulatory approvals, which may be time consuming and costly and with no guarantee that the product will come to market.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Semiconductor Industry Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Semiconductor Industry Risk. The semiconductor industry is highly cyclical, which could affect the availability and price of components and generally cause the operating results of semiconductor companies to vary significantly. Semiconductor companies typically face high capital and research and development costs requiring additional financing, which may be difficult or costly to obtain. In addition to the risk of rapid product obsolescence, many semiconductor companies may not successfully introduce new products, develop and maintain a loyal customer base or achieve general market acceptance for their products, and failure to do so could have a material adverse effect on their financial condition. Moreover, many semiconductor companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. As product cycles shorten and manufacturing capacity increases, semiconductor companies may become increasingly subject to aggressive pricing, which hampers their profitability. Reduced demand for end-user products, underutilization of manufacturing capacity, and other factors could adversely impact the operating results of companies in the semiconductor industry. The international operations of many semiconductor companies expose them to risks associated with instability and changes in economic and political conditions, foreign currency fluctuations, changes in foreign regulations, tariffs and trade disputes, competition from subsidized foreign competitors with lower production costs, and other risks inherent to international business.
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| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares China Technology & Semiconductor STAR 50 Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares CSI China Internet ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares CSI China Internet ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares CSI China Internet ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares CSI China Internet ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares CSI China Internet ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares CSI China Internet ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares CSI China Internet ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares CSI China Internet ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares CSI China Internet ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares CSI China Internet ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares CSI China Internet ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares CSI China Internet ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares CSI China Internet ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares CSI China Internet ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares CSI China Internet ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares CSI China Internet ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares CSI China Internet ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares CSI China Internet ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares CSI China Internet ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares CSI China Internet ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares CSI China Internet ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares CSI China Internet ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares CSI China Internet ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares CSI China Internet ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares CSI China Internet ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares CSI China Internet ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares CSI China Internet ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares CSI China Internet ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares CSI China Internet ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares CSI China Internet ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares CSI China Internet ETF | Passive Foreign Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Foreign Investment Companies Risk. A Fund may invest in companies that are considered to be “passive foreign investment companies” (“PFICs”), which are generally certain non-U.S. corporations that receive at least 75% of their annual gross income from passive sources (such as interest, dividends, certain rents and royalties or capital gains) or that hold at least 50% of their assets in investments producing such passive income. Therefore, the Funds could be subject to U.S. federal income tax and additional interest charges on gains and certain distributions with respect to those equity interests, even if all the income or gain is distributed to its shareholders in a timely manner. A Fund will not be able to pass through to its shareholders any credit or deduction for such taxes.
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| KraneShares CSI China Internet ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares CSI China Internet ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares CSI China Internet ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Dragon Capital Growth of Vietnam Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane or the Sub-Adviser’s security selection process may not produce the intended results.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane, the sub-adviser and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane and the sub-adviser are subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane, the sub-adviser and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Asia Pacific Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Asia-Pacific Risk. Investments in securities of issuers in Asia-Pacific countries involve risks that are specific to the Asia-Pacific region, including certain legal, regulatory, political and economic risks, including high interest rates, economic volatility, inflation, currency devaluations and high unemployment rates. Certain Asia-Pacific countries have experienced expropriation and/or nationalization of assets, confiscatory taxation, political instability, armed conflict and social instability as a result of religious, ethnic, socio-economic and/or political unrest. Political instability could have an adverse effect on economic or social conditions in these economies and may result in outbreaks of civil unrest, terrorist attacks or threats or acts of war in the affected areas, any of which could adversely affect the Fund. Some economies in this region are dependent on a range of commodities, and are strongly affected by international commodity prices and particularly vulnerable to price changes for these products. The market for securities in this region may also be directly influenced by the flow of international capital, and by the economic and market conditions of neighboring countries. Many Asia-Pacific economies have experienced rapid growth and industrialization, and there is no assurance that this growth rate will be maintained. Some Asia-Pacific economies are highly dependent on trade and economic conditions in other countries can impact these economies. Singapore, Malaysia, Thailand, Indonesia and the Philippines present different economic and political conditions from those in Western markets.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Vietnam Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Vietnam Risk. Vietnamese companies face risks associated with expropriation and/or nationalization of assets (including property and real estate), restrictions on and government intervention in international trade, confiscatory taxation, political instability, including authoritarian and/or military involvement in governmental decision making, armed conflict, the impact on the economy as a result of civil war, and social instability as a result of religious, ethnic and/or socioeconomic unrest. The Vietnamese government may exercise substantial influence over many aspects of the private sector, and may own or control certain companies therein. Accordingly, government actions could have a significant effect on economic conditions in the country, and on market conditions and prices of Vietnamese securities.
Vietnam is dependent on trading relationships with certain key trading partners, including the United States, China and Japan, and as a result may be adversely affected if demand for Vietnam’s exports in those nations declines. Vietnam has become a manufacturing hub and an important component of the global supply chains for many different industries, in some cases benefiting from the changing economic and political climate in other regional manufacturing hubs such as China. If this trend slows or reverses, Vietnamese companies across all industries would be adversely impacted. The Vietnamese government has undertaken reform of economic and market practices in recent years, but issues such as foreign ownership limits and lack of in-kind transfers remain. If deterioration occurs in Vietnam’s balance of payments, it could impose temporary restrictions on foreign capital remittances. The Fund could be adversely affected by delays in, or a refusal to grant, any required governmental approval for repatriation of capital, as well as by the application to the Fund of any restrictions on investments. Investing in Vietnam may require the Fund to adopt special procedures, seek local government approvals or take other actions, each of which may involve additional costs to the Fund. Vietnam may levy withholding or other taxes on dividend and interest income received by the Fund. Although in some cases a portion of these taxes may be recoverable, the non-recovered portion of foreign withholding taxes will reduce the income received from the Fund’s investments. The currencies of frontier markets, such as Vietnam, may be subject to more significant fluctuations and greater likelihood for speculation than the currencies of more developed markets.
The securities markets in Vietnam are underdeveloped and are often considered to be less correlated to global economic cycles than those markets located in more developed countries. As a result, securities markets in Vietnam are subject to greater risks associated with market volatility, lower market capitalization, lower trading volume, illiquidity, greater price fluctuations, uncertainty regarding the existence of trading markets, governmental control, heavy regulation of labor and industry and inflation. Vietnam has experienced, and may in the future experience, a high inflation rate, which is at least partially a result of the country’s large trade deficit. Due to governmental focus on economic growth at the expense of currency stability, the inflation rate may continue at a high level and economic stability could be threatened. Moreover, trading on securities markets may be suspended altogether. Also, market volatility may be further heightened by the actions of a few major investors. For example, a substantial increase or decrease in cash flows of funds investing in these markets could significantly affect local stock prices.
The government in Vietnam may restrict or control to varying degrees the ability of foreign investors to invest in securities of issuers located or operating in Vietnam. These restrictions and/or controls may at times limit or prevent foreign investment in securities of issuers located or operating in Vietnam. Moreover, Vietnam may require governmental approval or special licenses prior to investments by foreign investors and may also require governmental approval in connection with the repatriation of capital by foreign investors. The Vietnamese government may limit the amount of investments by foreign investors in a particular industry and/or issuer and may limit such foreign investment to a certain class of securities of an issuer that may have less advantageous rights than the classes available for purchase by domiciliaries of Vietnam and/or impose additional taxes on foreign investors.
These factors, among others, make investing in issuers located or operating in Vietnam significantly riskier than investing in issuers located or operating in more developed countries.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Frontier Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Frontier Markets Risk. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid, and as a result, may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed and traditional emerging markets. Investments in frontier markets may be subject to a greater risk of loss than investments in more developed and traditional emerging markets. Frontier markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk associated with custody of securities. Economic, political, illiquidity and currency risks may be more pronounced with respect to investments in frontier markets than in emerging markets.
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| KraneShares Dragon Capital Growth of Vietnam Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Dragon Capital Growth of Vietnam Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Dragon Capital Growth of Vietnam Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Electric Vehicles and Future Mobility Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Materials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Materials Sector Risk. The materials sector includes companies from the following and similar industries: chemicals; metals & mining; paper & forest products; containers & packaging; and construction materials. Many companies in the materials sector are significantly affected by the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, environmental policies and consumer demand. At times, worldwide production of industrial materials has exceeded demand as a result of over-building or economic downturns, leading to poor investment returns or losses. Other risks may include liability for environmental damage and general civil liabilities, depletion of resources, and mandated expenditures for safety and pollution control. The materials sector may also be affected by economic cycles, technical progress, labor relations, and government regulations.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Autonomous Vehicles And Future Mobility Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Autonomous Technology Companies Risk. Investments in autonomous vehicles and future mobility companies may be volatile. These companies are subject to intense competition, the risk of product obsolescence, changes in consumer preferences and legal, regulatory and political changes. Many of these companies make significant expenditures on research and development, and are heavily dependent on intellectual property rights, which may be challenged by other similar companies. A loss or impairment of intellectual property rights may adversely affect autonomous vehicles and future mobility companies. These vehicles may incorporate raw materials from companies concentrated in certain commodities, and may also rely on fuel sources that are more sensitive to commodities market activity than traditional vehicle fuels, which exposes the autonomous vehicles and future mobility companies to the price fluctuation of those commodities. They are also especially at risk of hacking, other cybersecurity events, and traffic accidents related to autonomous vehicles.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | South Korea Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | South Korea Risk. The Fund is susceptible to adverse market, political, regulatory and geographic events affecting South Korea. The South Korean economy is dependent on the economies of other Asian countries, especially China and Southeast Asia, and the United States as key trading partners. South Korea’s economy may be significantly affected by currency fluctuations and increasing competition from Asia’s other low-cost emerging economies. Escalated tensions involving the two nations and the outbreak of hostilities between the two nations, or even the threat of an outbreak of hostilities, could have a severe adverse effect on the South Korean economy. In addition, South Korea’s economic growth potential has recently been on a decline because of a rapidly aging population and structural problems, among other factors.
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| KraneShares Electric Vehicles and Future Mobility Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Electric Vehicles and Future Mobility Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Carbon Strategy ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Global Carbon Strategy ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Global Carbon Strategy ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
European Union Risk. The economies of the European Union are dependent to a significant extent on those of certain key trading partners, including China, the United States, and other European countries. A reduction in spending on products and services exported from the European Union, or volatility in the financial markets of member countries, may have an adverse impact on the broader European Union economy and could adversely affect the Fund. Separately, the European Union faces issues involving its membership, structure, procedures and policies. The United Kingdom (UK) officially withdrew from the European Union on January 31, 2020. Upon the UK’s withdrawal from the European Union, the European Union and the UK entered into a transition phase, which concluded on December 31, 2020, and the UK and the European Union agreed upon a Trade and Cooperation Agreement that became fully effective on May 1, 2021. The UK, European Union and broader global economy may still experience volatility in foreign exchange markets as a result of these events. The UK’s withdrawal may also destabilize some or all of the other European Union member countries and/or the Eurozone. The exit of additional member states from the European Union would subject its currency and banking system to increased risk and would likely result in increased volatility, illiquidity and potentially lower economic growth in the affected markets. Additionally, the reintroduction of national currencies in one or more European Union countries or the abandonment of the Euro as a currency could adversely affect the Fund.
California Risk. Because the Fund is exposed to carbon credits issued under the California Carbon Allowance “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting California. For example, natural disasters may disrupt the local, state or regional economy or certain sectors of the economy and may impact the prices of such carbon credit futures. California’s budget and fiscal operations face certain structural impediments and rely on revenue sources which have been historically sensitive to the economic environment. California’s diverse economy is the largest in the United States and one of the largest in the world with major components including high technology, trade, entertainment, manufacturing, tourism, construction, agriculture and services. Any downturn in these sectors or related industries may adversely affect the economy of the state and the prices of such carbon credit futures.
Eastern U.S. Risk. Because the Fund is exposed to carbon credit futures issued under the Regional Greenhouse Gas Initiative (“RGGI”) “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting the Eastern region of the United States. For example, flooding, warming temperatures, and precipitation variability are growing challenges in the Eastern region of the United States and may disrupt the local, state, or regional economies of the Eastern states or certain sectors of those economies and may impact the prices of such carbon credit futures. The economies of Eastern region of the United States are comprised of components including agriculture, tourism, and manufacturing. Any downturn in these sectors or related industries may adversely affect the economy of the Eastern region of the United States and the prices of such carbon credit futures.
Washington Risk. Because the Fund is exposed to carbon credits issued under the Washington Carbon Allowance “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting the State of Washington. Washington is the second state in the United States of America to implement an economy wide cap program, following California. This reflects the Washington Legislature’s strong commitment to tackling climate change. If the Washington Legislature was to revise its approach to climate change as a result of internal shifts in political dynamics or issues were to arise in the administration of the “cap and trade” program within Washington, this would potentially negatively impact the value of the Washington Carbon Allowance. Further, clean technology represents a key component of the economy in Washington. Any downturn in this sector or related industries may adversely affect the economy of the state and the prices of the carbon credit futures.
United Kingdom Risk. Because the Fund is exposed to carbon credits issued under the UK Allowance “cap and trade” program, the Fund’s performance also may be negatively impacted by factors affecting the UK. The economy of the UK is dependent to a significant extent on economies of certain key trading partners, including China, the United States, and other European countries. Following the UK’s withdrawal from the European Union on January 31, 2020, the European Union and the UK entered into a transition phase, which concluded on December 31, 2020, and the UK and the European Union agreed upon a Trade and Cooperation Agreement that became fully effective on May 1, 2021. The UK, European Union and broader global economy may still experience volatility in foreign exchange markets as a result of these events. The UK’s economy may still be affected by its withdrawal from the European Union, and any downturn in its major sectors or related industries may adversely affect the economy of the UK and the prices of such carbon credit futures.
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| KraneShares Global Carbon Strategy ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Global Carbon Strategy ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Global Carbon Strategy ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Global Carbon Strategy ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Global Carbon Strategy ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Global Carbon Strategy ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Global Carbon Strategy ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Index and may hold less than the total number of investments in the Index. Therefore, the Fund is subject to the risk that Krane’s investment selection process may not produce the intended results.
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| KraneShares Global Carbon Strategy ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Global Carbon Strategy ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Global Carbon Strategy ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| KraneShares Global Carbon Strategy ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
The Fund intends to treat its income from the Subsidiary and from index-linked structured notes as qualifying income. Income tax regulations on which taxpayers may rely for taxable years beginning after September 28, 2016, and other guidance provided by the IRS at the time of the introduction of such regulations, support that treatment, although there is no guidance directly addressing the status of such structured notes as securities. The tax treatment of the Fund’s investment in the Subsidiary or in such index-linked structured notes, however, may be adversely affected by future legislation, court decisions, Treasury Regulations and/or guidance issued by the IRS that could affect whether income derived from such investments is “qualifying income” under Subchapter M of the Internal Revenue Code, or otherwise affect the character, timing and/or amount of the Fund’s taxable income or any gains or distributions made by the Fund.
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| KraneShares Global Carbon Strategy ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Global Carbon Strategy ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Global Carbon Strategy ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Global Carbon Strategy ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares Global Carbon Strategy ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Global Carbon Strategy ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Index. This may be due to, among other factors, the Fund investments in carbon credit futures with different maturity dates, the Fund weighing the carbon credit futures differently than the Index, and the Fund’s purchase of carbon credit futures on different dates than the rebalancing date for the Index. To the extent that the Fund invests in other instruments that are consistent with its investment objective, such as futures contracts that are not carbon credit futures, options on futures contracts, swap contracts, and other investment companies and notes, the Fund’s ability to track the Index may be adversely affected.
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| KraneShares Global Carbon Strategy ETF | Carbon Emission Allowance And Cap And Trade Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Carbon Emission Allowance and Cap and Trade Risk. There is no assurance that cap and trade regimes will continue to exist. Cap and trade was designed to attempt to put a cap on pollution by putting a price on carbon emissions, but the approach may not prove to be an effective method of reduction in GHG emissions and or in achieving climate change objectives; and depending on the political climate globally, climate change concerns may be ignored or abandoned. As a result or due to other factors, cap and trade regimes may be terminated or may not be renewed upon their expiration. New technologies may arise that may diminish or eliminate the need for cap and trade markets. Ultimately, the cost of emissions credits is determined by the cost of actually reducing emissions levels. If the price of credits becomes too high, it will be more economical for companies to develop or invest in green technologies, thereby suppressing the demand for credits and adversely affect the Fund.
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| KraneShares Global Carbon Strategy ETF | Regulatory Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Regulatory Risk. The Fund is subject to the risk that a change in U.S. law and related regulations will impact the way the Fund operates, increase the particular costs of the Fund’s operations and/or change the competitive landscape. Additional legislative or regulatory changes could occur that may materially and adversely affect the Fund.
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| KraneShares Global Carbon Strategy ETF | Subsidiary Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Subsidiary Investment Risk. By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. Since the Subsidiary is organized under the law of the Cayman Islands and is not registered with the SEC under the Investment Company Act of 1940, as amended (the “1940 Act”), the Fund will not receive all of the protections offered to shareholders of registered investment companies. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as intended, which may negatively affect the Fund and its shareholders.
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| KraneShares Global Carbon Strategy ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares Global Carbon Strategy ETF | Commodity Pool Registration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Commodity Pool Registration Risk. Under regulations promulgated by the CFTC, the Fund and the Subsidiary are considered commodity pools, and therefore each is subject to regulation under the Commodity Exchange Act and CFTC rules. Krane and MLIA are registered as a commodity pool operator and commodity trading adviser, respectively, and manages the Fund and the Subsidiary in accordance with CFTC rules, as well as the rules that apply to registered investment companies. Commodity pools are subject to additional laws, regulations and enforcement policies, all of which may potentially increase compliance costs and may affect the operations and financial performance of the Fund and the Subsidiary. Additionally, positions in futures and other contracts may have to be liquidated at disadvantageous times or prices to prevent the Fund from exceeding any applicable position limits established by the CFTC. Such actions may subject the Fund to substantial losses.
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| KraneShares Global Carbon Strategy ETF | Energy Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Energy Sector Risk. Investments in, and/or exposure to, the energy sector, which includes energy commodities such as oil, gasoline, and carbon credits, may be highly volatile and can change quickly and unpredictably due to a number of factors, including the legislative or regulatory changes, adverse market conditions, increased competition affecting the energy sector, financial, accounting and tax matters and other events that the Fund cannot control. In addition, the value of energy commodities may fluctuate widely due to changes in supply and demand.
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| KraneShares Global Carbon Strategy ETF | U S Government Obligations Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect the Fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. Additionally, market prices and yields of securities supported by the full faith and credit of the U.S. government may decline or be negative for short or long periods of time.
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| KraneShares Global Carbon Strategy ETF | Futures Strategy Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Futures Contracts Risk. Successful use of futures contracts draws upon the Adviser’s skill and experience with respect to such instruments and is subject to special risk considerations. The primary risks associated with the use of futures contracts include: (a) an imperfect correlation between the change in market value of the reference asset and the price of the futures contract; (b) possible lack of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses caused by unanticipated market movements, which are potentially unlimited; (d) the inability to predict correctly the direction of market prices, interest rates, currency exchange rates and other economic factors; and (e) if the Fund has insufficient cash, it may have to sell investments from its portfolio to meet daily variation margin requirements, and the Fund may have to sell investments at a loss.
As a futures contract the Fund owns approaches its settlement date, the Fund may sell that futures contract and reinvest the proceeds in a similar contract with a more distant settlement date. This process is referred to as “rolling” a futures contract. The successful use of such a strategy depends upon the Adviser’s skill and experience. Although the Fund will attempt to roll from an expiring futures contract to another contract that the Adviser believes will generate the greatest yield for the Fund, the Fund nevertheless may incur a cost to “roll” the contract. In a commodity futures market where current month expiring contracts trade at a lower price than next month’s contract, a situation referred to as “contango,” absent the impact of the overall movement in commodity prices, the Fund may experience an adverse impact because it would be selling less expensive contracts and buying more expense contracts. In the event of a prolonged period of contango, and absent the impact of rising or falling commodity prices, there could be a significant negative impact on the Fund when it “rolls” its futures contract positions.
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| KraneShares Global Carbon Strategy ETF | Commodity Linked Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Commodity and Commodity-Linked Derivatives Risk. The Fund, directly or indirectly, may have significant investment exposure to the commodities markets and/or a particular sector of the commodities markets, which may subject it to greater volatility than investments in traditional securities. The commodities markets are impacted by a variety of factors, including market movements, resource availability, commodity price volatility, speculation in the commodities markets, domestic and foreign political and economic events and policies, trade policies and tariffs, war, acts of terrorism, changes in domestic or foreign interest rates and/or investor expectations concerning interest rates, domestic and foreign inflation rates and investment and trading activities in commodities. The value of a commodity-linked derivative investment typically is based upon the price movements of a physical commodity and may be affected by these same factors as well as credit and interest rate risks. In addition, investments in commodity-linked derivatives may be subject to greater volatility than non-derivative based investments.
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| KraneShares Global Carbon Strategy ETF | Foreign Investments Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Global Carbon Strategy ETF | Reverse Repurchase Agreements Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Reverse Repurchase Agreements Risk. In a reverse repurchase agreement, the Fund sells portfolio investments to another party and agrees to repurchase the investments at an agreed-upon price and date. Reverse repurchase agreements involve the risk that the counterparty will default on its obligations to the Fund, including by failing to return the investments in a timely manner, or at all, which may result in costs, delays, and losses to the Fund. Reverse repurchase agreements are viewed as a form of borrowing or leverage and may increase fluctuations in the Fund’s net asset value.
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| KraneShares Global Carbon Strategy ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Carbon Strategy ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Carbon Strategy ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Humanoid Robotics and Physical AI Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Artificial Intelligence Technology Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Artificial Intelligence Technology Risk. Companies in the artificial intelligence (“AI”) and technology industries typically have high research and capital expenditures and, as a result, their profitability can vary widely, if they are profitable at all. The space in which they are engaged is highly competitive and issuers’ products and services may become obsolete very quickly. These companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. The issuers are also subject to legal, regulatory and political changes that may have a large impact on their profitability. A failure in an issuer’s product or even questions about the safety of the product could be devastating to the issuer, especially if it is the marquee product of the issuer. It can be difficult to accurately capture what qualifies as an AI and Technology company.
Certain AI and Technology companies may face special risks that their products or services may not prove to be commercially successful. Such companies are also strongly affected by worldwide scientific or technological developments. As a result, their products may rapidly become obsolete. Such companies are also often subject to governmental regulation and may, therefore, be adversely affected by governmental policies. In addition, certain of such companies in which the Fund may invest may not currently be profitable and there can be no assurance that such companies will be profitable in the future.
The economy may be significantly impacted by the advanced development and increased regulation of artificial intelligence technologies. As artificial intelligence technologies are used more widely, the profitability and growth of the Fund’s holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which artificial intelligence technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Japan Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Japan Risk. The Japanese economy is heavily dependent upon international trade and may be subject to considerable degrees of economic, political and social instability, which could negatively affect the Fund. The Japanese yen has fluctuated widely during recent periods and may be affected by currency volatility elsewhere in Asia, especially Southeast Asia. In addition, the yen has had a history of unpredictable and volatile movements against the U.S. dollar. Japan has also experienced natural disasters, such as earthquakes and tidal waves, of varying degrees of severity, which could negatively affect the Fund. The Japanese economy has in the past been negatively affected at times by government intervention and protectionism, an unstable financial services sector, and a heavy reliance on international trade, a significant portion of which is conducted with nearby developing nations in East and Southeast Asia.
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| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Global Humanoid Robotics and Physical AI Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hang Seng TECH Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Hang Seng TECH Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Hang Seng TECH Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares Hang Seng TECH Index ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares Hang Seng TECH Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Hang Seng TECH Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Hang Seng TECH Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Hang Seng TECH Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Hang Seng TECH Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Hang Seng TECH Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Hang Seng TECH Index ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares Hang Seng TECH Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Hang Seng TECH Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Hang Seng TECH Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Hang Seng TECH Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Hang Seng TECH Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Hang Seng TECH Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid-capitalization companies.
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| KraneShares Hang Seng TECH Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Hang Seng TECH Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Hang Seng TECH Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Hang Seng TECH Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Hang Seng TECH Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Hang Seng TECH Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Hang Seng TECH Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares Hang Seng TECH Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Hang Seng TECH Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Hang Seng TECH Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Hang Seng TECH Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Hang Seng TECH Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Hang Seng TECH Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain components of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Hang Seng TECH Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hang Seng TECH Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hang Seng TECH Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hedgeye Hedged Equity Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Hedgeye Hedged Equity Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Hedgeye Hedged Equity Index ETF | Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Options Risk. An option is a contract that gives the purchaser (holder) of the option, in return for a premium, the right to buy from (call) or sell to (put) the seller (writer) of the option the security or currency underlying the option at a specified exercise price at any time during the term of the option (normally not exceeding nine months). The writer of an option has the obligation upon exercise of the option by its purchaser to deliver the underlying security or currency upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security or currency. Options are derivatives, which, as described above, can be illiquid and can imperfectly correlate with the reference asset(s).
The use of options involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by the time remaining until the expiration of the option contract, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors.
Any FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares Hedgeye Hedged Equity Index ETF | Clearing Member Default Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Clearing Member Default Risk. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The OCC acts as guarantor and central counterparty with respect to the options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected options positions, both of which would impair the Fund’s ability to execute its investment strategy. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.
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| KraneShares Hedgeye Hedged Equity Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Hedgeye Hedged Equity Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Hedgeye Hedged Equity Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Hedgeye Hedged Equity Index ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares Hedgeye Hedged Equity Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Hedgeye Hedged Equity Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Hedgeye Hedged Equity Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid-capitalization companies.
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| KraneShares Hedgeye Hedged Equity Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may have different options than the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Hedgeye Hedged Equity Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Hedgeye Hedged Equity Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Hedgeye Hedged Equity Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Hedgeye Hedged Equity Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Hedgeye Hedged Equity Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Hedgeye Hedged Equity Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Hedgeye Hedged Equity Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Hedgeye Hedged Equity Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Hedgeye Hedged Equity Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Hedgeye Hedged Equity Index ETF | Affiliated Index Provider Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Affiliated Index Provider Risk. The Index Provider is an affiliated person of the Adviser, which poses potential conflicts of interest. For example, a potential conflict could arise between an affiliated person of the Index Provider or the Adviser and each Fund if that entity attempted to use information regarding changes and composition of each Index to the detriment of each Fund. Additionally, potential conflicts could arise with respect to the personal trading activity of personnel of the affiliated person who may have access to, or knowledge of, pending changes to each Index’s composition methodology or the constituent securities in each Index prior to the time that information is publicly disseminated. If shared, such knowledge could facilitate “front-running” (which describes an instance in which other persons trade ahead of each Fund). Although the Adviser and the Index Provider have taken steps designed to ensure that these potential conflicts are mitigated (e.g., via the adoption of policies and procedures that are designed to minimize potential conflicts of interest and the implementation of informational barriers designed to minimize the potential for the misuse of information about the Index), there can be no assurance that such measures will be successful.
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| KraneShares Hedgeye Hedged Equity Index ETF | Key Man Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Key Man Risk. While certain aspects of calculating the Underlying Index are automated, not all of the processes for calculating the Underlying Index are. In fact, HRM’s ability to publish Hedgeye’s Risk Range ™ signals daily, which are a critical input to the Underlying Index, is heavily dependent on the manual activities of a single individual, HRM’S CEO and founder (“Key Man”). In the Key Man’s absence, the Risk Range™ signals will be published by another individual (“Secondary Calculator”). The formula utilized by the Secondary Calculator is based on a formula that incorporates the same factors as the formula used by the Key Man but this formula is not identical to the formula utilized by the Key Man. If the Key Man were to leave HRM or is unable to calculate the Risk Range ™ signals, the Risk Range signals and Underlying Index may not function as designed and adversely impact the Fund.
If the Risk Range™ signals are not published for any reason, the Index Provider and Calculation Agent will use the last available Risk Range™ signal to calculate the Underlying Index value. Under any of these circumstances, the Underlying Index would not be updated to incorporate current Risk Range signals in a timely manner, and the Underlying Index may not function as designed, which may adversely impact the Fund. If this were to occur for an extended period, the Fund may be required to change its investment objective or be liquidated.
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| KraneShares Hedgeye Hedged Equity Index ETF | Hedgeye Risk Range Signal Publication Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Hedgeye Risk Range™ Signal Publication Risk. The Underlying Index utilizes Hedgeye’s Risk Range™ signals as critical inputs. Those same Risk Range™ signals are made available daily by HRM to other subscribers of the Risk Range™ signals, which include both retail and institutional investors. Krane will receive the constituents of the Underlying Index from the Calculation Agent after Hedgeye’s Risk Range™ signals are published to all HRM subscribers. As a result, HRM subscribers will be able to act on the daily Risk Range™ signals ahead of the Fund. In addition, HRM subscribers may receive intraday updates to the Risk Range™ signals, whereas the Underlying Index will only utilize the initially published Risk Range™ signals.
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| KraneShares Hedgeye Hedged Equity Index ETF | Hedging Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Hedging Risk. The Fund’s hedging strategies may not be successful, and even if they are successful, the Fund’s exposures are not expected to be fully hedged at all times or over time. Hedges are subject to imperfect matching between the hedging instrument and the underlying security, and there can be no assurance that the Fund’s options transactions will be effective. Investments in forward foreign currency contracts and futures contracts may not perfectly offset actual fluctuations in the exchange rate between any foreign currency in which the Fund is directly or indirectly invested (such as by holding securities denominated in the foreign currency) and the U.S. dollar, including because currency exchange rates are volatile. In addition, forward foreign currency contracts are over-the-counter contracts that depend on performance by a counterparty; if such counterparty fails to perform, the Fund may lose money. Hedging will cause the Fund to have lower performance when the hedged asset is rising in value than it would if it did not hedge its exposure. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains.
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| KraneShares Hedgeye Hedged Equity Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hedgeye Hedged Equity Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Hedgeye Hedged Equity Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares High-Bandwidth Memory ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares High-Bandwidth Memory ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares High-Bandwidth Memory ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares High-Bandwidth Memory ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares High-Bandwidth Memory ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares High-Bandwidth Memory ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares High-Bandwidth Memory ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares High-Bandwidth Memory ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares High-Bandwidth Memory ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares High-Bandwidth Memory ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares High-Bandwidth Memory ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares High-Bandwidth Memory ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund is one of Krane’s first actively-managed strategies and the Fund may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund for these investments. Krane’s evaluations and assumptions regarding these investments may not successfully achieve the Fund’s investment objective given actual market conditions. Furthermore, for the portion of the Fund’s assets invested in the Underlying Index, the Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares High-Bandwidth Memory ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares High-Bandwidth Memory ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares High-Bandwidth Memory ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares High-Bandwidth Memory ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares High-Bandwidth Memory ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares High-Bandwidth Memory ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares High-Bandwidth Memory ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares High-Bandwidth Memory ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
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| KraneShares High-Bandwidth Memory ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares High-Bandwidth Memory ETF | Semiconductor Industry Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Semiconductor Industry Risk. The semiconductor industry is highly cyclical, which could affect the availability and price of components and generally cause the operating results of semiconductor companies to vary significantly. Semiconductor companies typically face high capital and research and development costs requiring additional financing, which may be difficult or costly to obtain. In addition to the risk of rapid product obsolescence, many semiconductor companies may not successfully introduce new products, develop and maintain a loyal customer base or achieve general market acceptance for their products, and failure to do so could have a material adverse effect on their financial condition. Moreover, many semiconductor companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. As product cycles shorten and manufacturing capacity increases, semiconductor companies may become increasingly subject to aggressive pricing, which hampers their profitability. Reduced demand for end-user products, underutilization of manufacturing capacity, and other factors could adversely impact the operating results of companies in the semiconductor industry. The international operations of many semiconductor companies expose them to risks associated with instability and changes in economic and political conditions, foreign currency fluctuations, changes in foreign regulations, tariffs and trade disputes, competition from subsidized foreign competitors with lower production costs, and other risks inherent to international business.
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| KraneShares High-Bandwidth Memory ETF | South Korea Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | South Korea Risk. The Fund is susceptible to adverse market, political, regulatory and geographic events affecting South Korea. The South Korean economy is dependent on the economies of other Asian countries, especially China and Southeast Asia, and the United States as key trading partners. South Korea’s economy may be significantly affected by currency fluctuations and increasing competition from Asia’s other low-cost emerging economies. Escalated tensions involving the two nations and the outbreak of hostilities between the two nations, or even the threat of an outbreak of hostilities, could have a severe adverse effect on the South Korean economy. In addition, South Korea’s economic growth potential has recently been on a decline because of a rapidly aging population and structural problems, among other factors.
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| KraneShares High-Bandwidth Memory ETF | Artificial Intelligence Technology Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Artificial Intelligence Technology Risk. Companies in the artificial intelligence (“AI”) and technology industries typically have high research and capital expenditures and, as a result, their profitability can vary widely, if they are profitable at all. The space in which they are engaged is highly competitive and issuers’ products and services may become obsolete very quickly. These companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. The issuers are also subject to legal, regulatory and political changes that may have a large impact on their profitability. A failure in an issuer’s product or even questions about the safety of the product could be devastating to the issuer, especially if it is the marquee product of the issuer. It can be difficult to accurately capture what qualifies as an AI and Technology company.
Certain AI and Technology companies may face special risks that their products or services may not prove to be commercially successful. Such companies are also strongly affected by worldwide scientific or technological developments. As a result, their products may rapidly become obsolete. Such companies are also often subject to governmental regulation and may, therefore, be adversely affected by governmental policies. In addition, certain of such companies in which the Fund may invest may not currently be profitable and there can be no assurance that such companies will be profitable in the future.
The economy may be significantly impacted by the advanced development and increased regulation of artificial intelligence technologies. As artificial intelligence technologies are used more widely, the profitability and growth of the Fund’s holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which artificial intelligence technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.
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| KraneShares High-Bandwidth Memory ETF | High Bandwidth Memory Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Bandwidth Memory Companies Risk. The Fund invests in High Bandwidth Memory Companies, which may have limited product lines, markets, financial resources or personnel and are subject to the risks of changes in business cycles, world economic growth, technological progress and government regulation. These companies are also heavily dependent on intellectual property rights, and challenges to or misappropriation of such rights could have a material adverse effect on such companies. Securities of High Bandwidth Memory Companies tend to be more volatile than securities of companies that rely less heavily on technology. High Bandwidth Memory Companies typically engage in significant amounts of spending on research and development, and rapid changes to the field could have a material adverse effect on a company’s operating results. Additionally, the development, manufacturing, and commercialization of semiconductor memory technologies, including HBM, DRAM and NAND, as well as related subsystems, equipment, materials, and services, are complex and evolving, and may face unforeseen technical challenges (including yield and integration issues), supply chain disruptions, intense competition and pricing volatility, regulatory developments (including export controls), and market acceptance uncertainties. As a result, investments in High Bandwidth Memory Companies may be subject to higher levels of risk and volatility.
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| KraneShares High-Bandwidth Memory ETF | Line Of Business Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Line of Business Risk. Certain companies included in the Fund’s portfolio will be engaged in other lines of business unrelated to the development of memory products, and these lines of business could adversely affect their operating results. The operating results of these companies may fluctuate as a result of these additional risks and events in the other lines of business. Despite a company’s possible success in activities linked to its development of memory products, there can be no assurance that the other lines of business in which these companies are engaged will not have an adverse effect on a company’s business or financial condition.
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| KraneShares High-Bandwidth Memory ETF | Taiwan Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Taiwan Risk. Investments in Taiwanese issuers involve risks that are specific to Taiwan, including legal, regulatory, political and economic risks. Political and economic developments of Taiwan’s neighbors may have an adverse effect on Taiwan’s economy. Specifically, Taiwan’s geographic proximity and history of political contention with China have resulted in ongoing tensions, which may materially affect the Taiwanese economy and its securities market and may have an adverse impact on the values of the Fund’s investments in Taiwan, or make such investments impracticable or impossible.
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| KraneShares High-Bandwidth Memory ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares High-Bandwidth Memory ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Options Risk. An option is a contract that gives the purchaser (holder) of the option, in return for a premium, the right to buy from (call) or sell to (put) the seller (writer) of the option the security or currency underlying the option at a specified exercise price at any time during the term of the option (normally not exceeding nine months). The writer of an option has the obligation upon exercise of the option by its purchaser to deliver the underlying security or currency upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security or currency. Options are derivatives, which, as described above, can be illiquid and can imperfectly correlate with the reference asset(s).
The use of options involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by the time remaining until the expiration of the option contract, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors.
Any FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Clearing Member Default Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Clearing Member Default Risk. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The OCC acts as guarantor and central counterparty with respect to the options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected options positions, both of which would impair the Fund’s ability to execute its investment strategy. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid-capitalization companies.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may have different options than the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Option Income Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Option Income Risk. The Fund generates option premium income generated from the sale of options (“option income”). This option income generally is classified as a return of capital for financial accounting purposes, which is how such income is required to be reported on the 19(a) notices that the Fund is required to issue after its monthly distributions. However, the 19(a) notices do not reflect the tax character of the option income, which is determined after the end of the calendar year. The option income for tax purposes is likely to be considered taxable investment income and may not reduce your tax basis in your shares of the Fund when distributed.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Hedging Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Hedging Risk. The Fund’s hedging strategies may not be successful, and even if they are successful, the Fund’s exposures are not expected to be fully hedged at all times or over time. Hedges are subject to imperfect matching between the hedging instrument and the underlying security, and there can be no assurance that the Fund’s options transactions will be effective. Investments in forward foreign currency contracts and futures contracts may not perfectly offset actual fluctuations in the exchange rate between any foreign currency in which the Fund is directly or indirectly invested (such as by holding securities denominated in the foreign currency) and the U.S. dollar, including because currency exchange rates are volatile. In addition, forward foreign currency contracts are over-the-counter contracts that depend on performance by a counterparty; if such counterparty fails to perform, the Fund may lose money. Hedging will cause the Fund to have lower performance when the hedged asset is rising in value than it would if it did not hedge its exposure. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Swap Agreement Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Swap Agreement Risk. Swap agreements are a type of derivative instrument that subjects the Fund to counterparty credit, liquidity, and correlation risks, including that: (i) the Fund may not be able to enter into replacement swap agreements in the event a current swap is terminated (ii) unfunded swap agreements may involve greater leverage risks than funded swaps; (iii) the swap agreement may not reflect the performance of the Underlying Index or the Reference Index as expected due to differences in calculation methods or expenses; and (iv) during market disruptions, the Fund may be unable to enter into new swap agreements or adjust existing positions at favorable prices. In volatile markets, the Fund may not be able to close out a position without incurring a significant amount of loss.
The counterparty to a swap agreement may be entitled to terminate the swap agreement at its then current market value upon the occurrence of certain extraordinary market events or at its discretion upon notice to the Fund. Under such circumstances, if the Adviser is unable to enter into new swap agreements with a suitable counterparty, the Adviser may recommend to the Board of Trustees to immediately liquidate the Fund. A liquidation can be initiated by the Board of Trustees without a shareholder vote. While shareholder interests will be the paramount consideration in a liquidation under such circumstances, the timing of the liquidation may not be favorable to certain individual shareholders.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Futures Contracts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Futures Contracts Risk. Successful use of futures contracts draws upon the Adviser’s or Sub-Adviser’s skill and experience with respect to such instruments and is subject to special risk considerations. The primary risks associated with the use of futures contracts include: (a) an imperfect correlation between the change in market value of the reference asset and the price of the futures contract; (b) possible lack of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses caused by unanticipated market movements, which are potentially unlimited; and (d) the inability to predict correctly the direction of market prices, interest rates, currency exchange rates and other economic factors. When the Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial. If the Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | New Small Funds Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares InspereX Nasdaq Dynamic Buffered High Income Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares KWEB Covered Call Strategy ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund (either directly or through its investments in the Underlying Fund) is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares KWEB Covered Call Strategy ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares KWEB Covered Call Strategy ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares KWEB Covered Call Strategy ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares KWEB Covered Call Strategy ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares KWEB Covered Call Strategy ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares KWEB Covered Call Strategy ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares KWEB Covered Call Strategy ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares KWEB Covered Call Strategy ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares KWEB Covered Call Strategy ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares KWEB Covered Call Strategy ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares KWEB Covered Call Strategy ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares KWEB Covered Call Strategy ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares KWEB Covered Call Strategy ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares KWEB Covered Call Strategy ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares KWEB Covered Call Strategy ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares KWEB Covered Call Strategy ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares KWEB Covered Call Strategy ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares KWEB Covered Call Strategy ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on the Adviser’s success or failure to implement investment strategies for the Fund. The Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares KWEB Covered Call Strategy ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares KWEB Covered Call Strategy ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares KWEB Covered Call Strategy ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares KWEB Covered Call Strategy ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares KWEB Covered Call Strategy ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares KWEB Covered Call Strategy ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares KWEB Covered Call Strategy ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares KWEB Covered Call Strategy ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares KWEB Covered Call Strategy ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
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| KraneShares KWEB Covered Call Strategy ETF | Option Income Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Option Income Risk. The Fund generates option premium income generated from the sale of covered call options (“option income”). This option income generally is classified as a return of capital for financial accounting purposes, which is how such income is required to be reported on the 19(a) notices that the Fund is required to issue after its monthly distributions. However, the 19(a) notices do not reflect the tax character of the option income, which is determined after the end of the calendar year. The option income for tax purposes is likely to be considered taxable investment income and may not reduce your tax basis in your shares of the Fund when distributed. The Fund currently intends to distribute on a monthly basis its option income so that the Fund’s monthly distribution percentage does not exceed 2% of net asset value. The Fund’s distribution in December may exceed this amount in order for the Fund to continue to qualify as a regulated investment company.
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| KraneShares KWEB Covered Call Strategy ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. The Fund may incur a high portfolio turnover rate, which may increase the Fund’s brokerage commission costs, generate net short-term capital gains and negatively impact the Fund’s performance. Regulations require that the portfolio turnover rate be calculated without regard to trades of short-term cash instruments, in-kind transactions or derivatives transactions, which may comprise a significant portion of the Fund’s trading. If such trades were reflected, the calculated portfolio turnover rate may be significantly higher.
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| KraneShares KWEB Covered Call Strategy ETF | Covered Call Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Covered Call Options Risk. By writing covered call options in return for the receipt of premiums, the Fund will give up the opportunity to benefit from potential increases in the value of the Index above the exercise prices of such options, but will continue to bear the risk of declines in the value of the Index. The premiums received from the options may not be sufficient to offset any losses sustained from such declines. In addition, the Fund’s ability to sell the securities underlying the options will be limited while the options are in effect unless the Fund cancels out the option positions through the purchase of offsetting identical options prior to the expiration of the written options. As the writer of a call option, the Fund may not be able to control the time when it may be required to fulfill its obligation to the purchaser of the option; however, the terms of the FLEX options typically written by the Fund will generally make them exercisable only on their expiration date. Exchanges may suspend the trading of options in volatile markets. If trading is suspended, the Fund may be unable to write options at times that may be desirable or advantageous to do so.
The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors. If the Fund was required to close out an option position prior to expiration, an increase in implied volatility could result in higher option prices and losses to the Fund, depending on when the option was written. A decrease in implied volatility results in lower option prices, and this could result in lower options premiums at the time that the option is written.
There may be an imperfect correlation between the movement in prices of options and the securities underlying them and there may at times not be a liquid secondary market for various options. The trading in FLEX options may be less deep and liquid than the market for certain other securities. FLEX options may be less liquid than certain non-customized options. In a less liquid market for the FLEX options, the liquidation of a large number of options may more significantly impact the price. A less liquid trading market may adversely impact the value of the FLEX options and the value of your investment.
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| KraneShares KWEB Covered Call Strategy ETF | Return Of Capital Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Return of Capital Risk. Historically, a portion of the Fund’s distributions have been treated as a return of capital for tax purposes. Return of capital distributions are not taxable income to you but reduce your tax basis in your shares of the Fund. Such a reduction in tax basis will result in larger taxable gains and/or lower tax losses on a subsequent sale of shares of the Fund. There is no guarantee that the character of the Fund’s distributions will be similar in the future. |
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| KraneShares KWEB Covered Call Strategy ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares KWEB Covered Call Strategy ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares KWEB Covered Call Strategy ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Man Buyout Beta Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Man Buyout Beta Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Man Buyout Beta Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Man Buyout Beta Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Man Buyout Beta Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Man Buyout Beta Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Man Buyout Beta Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities; (2) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers; (3) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (4) there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Man Buyout Beta Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Man Buyout Beta Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Man Buyout Beta Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Man Buyout Beta Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Man Buyout Beta Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund.
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| KraneShares Man Buyout Beta Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Man Buyout Beta Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Man Buyout Beta Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Man Buyout Beta Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
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| KraneShares Man Buyout Beta Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares Man Buyout Beta Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Man Buyout Beta Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
There is no guarantee that the methodology the Index Provider uses to identify constituents for the Underlying Index will achieve its intended result or provide an accurate assessment of included constituents. The Underlying Index relies on various sources of information to assess the potential constituents of the Underlying Index, including information that may be based on assumptions or estimates. Neither the Fund nor Krane can offer assurances that the Index Provider’s sources of information are reliable. There can be no guarantee that the methodology underlying the Underlying Index, the Underlying Index construction and computation processes, or the daily calculation of the Underlying Index or its methodology will be free from error or that an error will be identified and/or corrected, which may have an adverse impact on the Fund.
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| KraneShares Man Buyout Beta Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, the use of representative sampling strategy, if applicable, asset valuation differences, tax considerations, the unavailability of securities in the Underlying Index from time to time and other liquidity constraints.
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| KraneShares Man Buyout Beta Index ETF | Affiliated Index Provider Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Affiliated Index Provider Risk. The Index Provider is an affiliated person of the Adviser, which poses potential conflicts of interest. For example, a potential conflict could arise between an affiliated person of the Index Provider or the Adviser and each Fund if that entity attempted to use information regarding changes and composition of each Index to the detriment of each Fund. Additionally, potential conflicts could arise with respect to the personal trading activity of personnel of the affiliated person who may have access to, or knowledge of, pending changes to each Index’s composition methodology or the constituent securities in each Index prior to the time that information is publicly disseminated. If shared, such knowledge could facilitate “front-running” (which describes an instance in which other persons trade ahead of each Fund). Although the Adviser and the Index Provider have taken steps designed to ensure that these potential conflicts are mitigated (e.g., via the adoption of policies and procedures that are designed to minimize potential conflicts of interest and the implementation of informational barriers designed to minimize the potential for the misuse of information about the Index), there can be no assurance that such measures will be successful.
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| KraneShares Man Buyout Beta Index ETF | Model And Data Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Model and Data Risk. The Underlying Index relies on models from Numeric as part of the index methodology. Models rely on various sources of information and data (“data”) and such data may be incorrect or incomplete making the models unreliable. Models that have been formulated on the basis of past market data may not be indicative of future price movements. Models may not be reliable or produce unexpected results if unusual or disruptive events cause market moves the nature or size of which are inconsistent with the historic performance of individual markets and their relationship to one another or to other macroeconomic events. Models also may have hidden biases or exposure to broad structural or sentiment shifts. In the event that actual events fail to conform to the assumptions underlying such models, losses could be incurred. The performance of the investment models may be impacted by software or other technology malfunctions, programming inaccuracies, and similar circumstances. While the Underlying Index seeks to provide a proxy for private equity performance and risk exposure similar to companies in private equity buyout funds, there is no guarantee that such exposure will be obtained using public equities or that the models and data used by the Underlying Index will be able to provide such exposure.
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| KraneShares Man Buyout Beta Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Man Buyout Beta Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Man Buyout Beta Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Mount Lucas Managed Futures Index Strategy ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
European Union Risk. The economies of the European Union are dependent to a significant extent on those of certain key trading partners, including China, the United States, and other European countries. A reduction in spending on products and services exported from the European Union, or volatility in the financial markets of member countries, may have an adverse impact on the broader European Union economy and could adversely affect the Fund. Separately, the European Union faces issues involving its membership, structure, procedures and policies. The United Kingdom (UK) officially withdrew from the European Union on January 31, 2020. Upon the UK’s withdrawal from the European Union, the European Union and the UK entered into a transition phase, which concluded on December 31, 2020, and the UK and the European Union agreed upon a Trade and Cooperation Agreement that became fully effective on May 1, 2021. The UK, European Union and broader global economy may still experience volatility in foreign exchange markets as a result of these events. The UK’s withdrawal may also destabilize some or all of the other European Union member countries and/or the Eurozone. The exit of additional member states from the European Union would subject its currency and banking system to increased risk and would likely result in increased volatility, illiquidity and potentially lower economic growth in the affected markets. Additionally, the reintroduction of national currencies in one or more European Union countries or the abandonment of the Euro as a currency could adversely affect the Fund.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. If a trading halt occurs, a shareholder may temporarily be unable to purchase or sell shares of the Fund. In addition, although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Index and may hold less than the total number of investments in the Index. Therefore, the Fund is subject to the risk that the Sub-Adviser’s investment selection process may not produce the intended results.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Index investments, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign investments and unable to invest in certain constituents of the Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Index is based on investment’s closing prices on local foreign markets, the Fund’s ability to track the Index may be adversely affected.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Regulatory Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Regulatory Risk. The Fund is subject to the risk that a change in U.S. law and related regulations will impact the way the Fund operates, increase the particular costs of the Fund’s operations and/or change the competitive landscape. Additional legislative or regulatory changes could occur that may materially and adversely affect the Fund.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Subsidiary Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Subsidiary Investment Risk. By investing in the Subsidiary, the Fund is indirectly exposed to the risks associated with the Subsidiary’s investments. Since the Subsidiary is organized under the law of the Cayman Islands and is not registered with the SEC under the Investment Company Act of 1940, as amended (the “1940 Act”), the Fund will not receive all of the protections offered to shareholders of registered investment companies. Changes in the laws of the United States and/or the Cayman Islands could result in the inability of the Fund and/or the Subsidiary to operate as intended, which may negatively affect the Fund and its shareholders.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Futures Contract Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Futures Contract Risk. Successful use of futures contracts draws upon the Adviser’s or Sub-Adviser’s skill and experience with respect to such instruments and is subject to special risk considerations. The primary risks associated with the use of futures contracts include: (a) an imperfect correlation between the change in market value of the reference asset and the price of the futures contract; (b) possible lack of a liquid secondary market for a futures contract and the resulting inability to close a futures contract when desired; (c) losses caused by unanticipated market movements, which are potentially unlimited; and (d) the inability to predict correctly the direction of market prices, interest rates, currency exchange rates and other economic factors. When the Fund purchases or sells a futures contract, it is subject to daily variation margin calls that could be substantial. If the Fund has insufficient cash to meet daily variation margin requirements, it might need to sell securities at a time when such sales are disadvantageous.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Commodity Pool Registration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Commodity Pool Registration Risk. Under regulations promulgated by the CFTC, the Fund and the Subsidiary are considered commodity pools, and therefore each is subject to regulation under the Commodity Exchange Act and CFTC rules. Krane and MLIA are registered as a commodity pool operator and commodity trading adviser, respectively, and manages the Fund and the Subsidiary in accordance with CFTC rules, as well as the rules that apply to registered investment companies. Commodity pools are subject to additional laws, regulations and enforcement policies, all of which may potentially increase compliance costs and may affect the operations and financial performance of the Fund and the Subsidiary. Additionally, positions in futures and other contracts may have to be liquidated at disadvantageous times or prices to prevent the Fund from exceeding any applicable position limits established by the CFTC. Such actions may subject the Fund to substantial losses.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | U S Government Obligations Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect the Fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. Additionally, market prices and yields of securities supported by the full faith and credit of the U.S. government may decline or be negative for short or long periods of time.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Foreign Investments Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Affiliated Index Provider Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Affiliated Index Provider Risk. The Index Provider is an affiliated person of the Adviser, which poses potential conflicts of interest. For example, a potential conflict could arise between an affiliated person of the Index Provider or the Adviser and each Fund if that entity attempted to use information regarding changes and composition of each Index to the detriment of each Fund. Additionally, potential conflicts could arise with respect to the personal trading activity of personnel of the affiliated person who may have access to, or knowledge of, pending changes to each Index’s composition methodology or the constituent securities in each Index prior to the time that information is publicly disseminated. If shared, such knowledge could facilitate “front-running” (which describes an instance in which other persons trade ahead of each Fund). Although the Adviser and the Index Provider have taken steps designed to ensure that these potential conflicts are mitigated (e.g., via the adoption of policies and procedures that are designed to minimize potential conflicts of interest and the implementation of informational barriers designed to minimize the potential for the misuse of information about the Index), there can be no assurance that such measures will be successful.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Commodit And Commodity Linked Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Commodity and Commodity-Linked Derivatives Risk. The Fund, directly or indirectly, may have significant investment exposure to the commodities markets and/or a particular sector of the commodities markets, which may subject it to greater volatility than investments in traditional securities. The commodities markets are impacted by a variety of factors, including market movements, resource availability, commodity price volatility, speculation in the commodities markets, domestic and foreign political and economic events and policies, trade policies and tariffs, war, acts of terrorism, changes in domestic or foreign interest rates and/or investor expectations concerning interest rates, domestic and foreign inflation rates and investment and trading activities in commodities. The value of a commodity-linked derivative investment typically is based upon the price movements of a physical commodity and may be affected by these same factors as well as credit and interest rate risks. In addition, investments in commodity-linked derivatives may be subject to greater volatility than non-derivative based investments.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Short Sale Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Short Sale Risk. Short sales, at least theoretically, present a risk of unlimited loss on an individual security basis, since the Fund may be required to buy the security sold short at a time when the security has appreciated in value, and there is potentially no limit to the amount of such appreciation. Because the Fund may invest the proceeds of a short sale, another effect of short selling on the Fund is leverage, in that it amplifies changes in the Fund’s net asset value since it increases the exposure of the Fund to the market. The Fund may not always be able to close out a short position at a favorable time or price. If the Fund covers its short sale at an unfavorable price, the cover transaction is likely to reduce or eliminate any gain, or cause a loss to the Fund. When the Fund is selling a security short, it must maintain a segregated account of cash or high-grade securities equal to the margin requirement. As a result, the Fund may maintain high levels of cash or other liquid assets (such as U.S. Treasury bills, money market instruments, certificates of deposit, high quality commercial paper and long equity positions). The Fund may utilize the collateral obtained from securities lending for this cash. The need to maintain cash or other liquid assets in segregated accounts could limit the Fund’s ability to pursue other opportunities as they arise.
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| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Mount Lucas Managed Futures Index Strategy ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI All China Health Care Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares MSCI All China Health Care Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares MSCI All China Health Care Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares MSCI All China Health Care Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares MSCI All China Health Care Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares MSCI All China Health Care Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares MSCI All China Health Care Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares MSCI All China Health Care Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares MSCI All China Health Care Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares MSCI All China Health Care Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares MSCI All China Health Care Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares MSCI All China Health Care Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares MSCI All China Health Care Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares MSCI All China Health Care Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares MSCI All China Health Care Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares MSCI All China Health Care Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares MSCI All China Health Care Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares MSCI All China Health Care Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares MSCI All China Health Care Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares MSCI All China Health Care Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares MSCI All China Health Care Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares MSCI All China Health Care Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares MSCI All China Health Care Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares MSCI All China Health Care Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares MSCI All China Health Care Index ETF | Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Mid-Capitalization Company Risk. Investing in the securities of medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares MSCI All China Health Care Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares MSCI All China Health Care Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares MSCI All China Health Care Index ETF | Healthcare Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Healthcare Sector Risk. The profitability of companies in the healthcare sector may be affected by government regulations and government healthcare programs, government reimbursement for medical expenses, increases or decreases in the cost of medical products and services, limited product lines, increased emphasis on the delivery of healthcare through outpatient services and product liability claims. Many healthcare companies are heavily dependent on patent protection, which may be time consuming and costly, and the expiration of a company’s patent may adversely affect that company’s profitability. Healthcare companies are subject to competitive forces that may result in pricing pressure, including price discounting, and may be thinly capitalized and susceptible to product obsolescence. Many new products in the healthcare sector require significant research and development and may be subject to regulatory approvals, which may be time consuming and costly and with no guarantee that the product will come to market.
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| KraneShares MSCI All China Health Care Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI All China Health Care Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI All China Health Care Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI China Clean Technology Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares MSCI China Clean Technology Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares MSCI China Clean Technology Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares MSCI China Clean Technology Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares MSCI China Clean Technology Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares MSCI China Clean Technology Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares MSCI China Clean Technology Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares MSCI China Clean Technology Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares MSCI China Clean Technology Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares MSCI China Clean Technology Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares MSCI China Clean Technology Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares MSCI China Clean Technology Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares MSCI China Clean Technology Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares MSCI China Clean Technology Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares MSCI China Clean Technology Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares MSCI China Clean Technology Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares MSCI China Clean Technology Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares MSCI China Clean Technology Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares MSCI China Clean Technology Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares MSCI China Clean Technology Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares MSCI China Clean Technology Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares MSCI China Clean Technology Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares MSCI China Clean Technology Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares MSCI China Clean Technology Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares MSCI China Clean Technology Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares MSCI China Clean Technology Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares MSCI China Clean Technology Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares MSCI China Clean Technology Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares MSCI China Clean Technology Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares MSCI China Clean Technology Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares MSCI China Clean Technology Index ETF | Clean Technology Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Clean Technology Risk. Issuers engaged in clean technology business lines may be difficult to identify and investments in them may be volatile. They may be highly dependent upon government subsidies, contracts with government entities, and the successful development of new and proprietary technologies. Such technologies risk rapid product obsolescence, short product cycles, and competition from new market entrants. Current valuation methods used to value companies involved in alternative and clean power technology sectors have not been in widespread use for a significant period of time, and it is difficult to value share prices of such issuers. In addition, seasonal weather conditions, fluctuations in supply of and demand for clean energy products (including, in relation to traditional energy products, such as oil and gas), changes in energy prices, and international political events may cause fluctuations in the performance of these issuers and the prices of their securities. Other countries, including the U.S., may take steps against Chinese companies engaged in clean technology services and products, such as through the imposition of tariffs and anti-dumping duties. Even companies that are classified as being involved in clean technology services and products may not necessarily compare favorably with respect to their clean technology practices and impact to those of other issuers.
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| KraneShares MSCI China Clean Technology Index ETF | Utilities Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Utilities Sector Risk. Companies in the utilities industry may have difficulty obtaining an adequate return on invested capital, raising capital, and financing large construction programs during periods of inflation or unsettled capital markets; face restrictions on operations and increased cost and delays attributable to environmental considerations and regulation; find that existing plants, equipment or products have been rendered obsolete by technological innovations; and be subject to increased costs because of the scarcity of certain fuels or the effects of man-made disasters. Deregulation is subjecting utility companies to greater competition and may adversely affect profitability. As deregulation allows utility companies to diversify outside of their original geographic regions and their traditional lines of business, utility companies may engage in riskier ventures. Government regulators monitor and control utility operations, revenues and costs, and therefore may limit utility profits. Regulatory authorities may also restrict utility companies’ access to new markets, thereby diminishing these companies’ long-term prospects. Energy conservation and changes in climate policy may have a significant adverse impact on the revenues and expenses of utility companies.
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| KraneShares MSCI China Clean Technology Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI China Clean Technology Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI China Clean Technology Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI Emerging Markets ex China Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares MSCI Emerging Markets ex China Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares MSCI Emerging Markets ex China Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares MSCI Emerging Markets ex China Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares MSCI Emerging Markets ex China Index ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares MSCI Emerging Markets ex China Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares MSCI Emerging Markets ex China Index ETF | South Korea Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | South Korea Risk. The Fund is susceptible to adverse market, political, regulatory and geographic events affecting South Korea. The South Korean economy is dependent on the economies of other Asian countries, especially China and Southeast Asia, and the United States as key trading partners. South Korea’s economy may be significantly affected by currency fluctuations and increasing competition from Asia’s other low-cost emerging economies. Escalated tensions involving the two nations and the outbreak of hostilities between the two nations, or even the threat of an outbreak of hostilities, could have a severe adverse effect on the South Korean economy. In addition, South Korea’s economic growth potential has recently been on a decline because of a rapidly aging population and structural problems, among other factors.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Taiwan Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Taiwan Risk. Investments in Taiwanese issuers involve risks that are specific to Taiwan, including legal, regulatory, political and economic risks. Political and economic developments of Taiwan’s neighbors may have an adverse effect on Taiwan’s economy. Specifically, Taiwan’s geographic proximity and history of political contention with China have resulted in ongoing tensions, which may materially affect the Taiwanese economy and its securities market and may have an adverse impact on the values of the Fund’s investments in Taiwan, or make such investments impracticable or impossible.
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| KraneShares MSCI Emerging Markets ex China Index ETF | India Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | India Risk. Investments in Indian issuers involve risks that are specific to India, including legal, regulatory, political, currency and economic risks impacting Indian businesses and the Indian economy, changes in Indian law or regulations and the status of India’s relations with other countries. Indian government actions in the future could have a significant effect on the Indian economy, which could affect private sector companies and the Fund. Political and legal uncertainty, greater government control over the economy, currency fluctuations or blockage, and the risk of nationalization or expropriation of assets may result in higher potential for losses. The securities markets in India are relatively underdeveloped and may subject the Fund to higher transaction costs or greater uncertainty than investments in more developed securities markets.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Non Diversification Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversification Risk. The Fund may become “non-diversified,” as defined under the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the Underlying Index. To the extent the Fund is non-diversified, the Fund may invest a large percentage of its assets in securities or other instruments representing a small number of issuers. As a result, the Fund’s performance may depend to a greater extent on the performance of a small number of issuers or counterparties.
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| KraneShares MSCI Emerging Markets ex China Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI Emerging Markets ex China Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI Emerging Markets ex China Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | The Fund may become “non-diversified,” as defined under the 1940 Act, solely as a result of a change in relative market capitalization or index weighting of one or more constituents of the Underlying Index. To the extent the Fund is non-diversified, the Fund may invest a large percentage of its assets in securities or other instruments representing a small number of issuers. As a result, the Fund’s performance may depend to a greater extent on the performance of a small number of issuers or counterparties. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI One Belt One Road Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares MSCI One Belt One Road Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares MSCI One Belt One Road Index ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares MSCI One Belt One Road Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares MSCI One Belt One Road Index ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares MSCI One Belt One Road Index ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares MSCI One Belt One Road Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares MSCI One Belt One Road Index ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares MSCI One Belt One Road Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares MSCI One Belt One Road Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares MSCI One Belt One Road Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares MSCI One Belt One Road Index ETF | New Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | New/Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares MSCI One Belt One Road Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares MSCI One Belt One Road Index ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares MSCI One Belt One Road Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares MSCI One Belt One Road Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares MSCI One Belt One Road Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares MSCI One Belt One Road Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares MSCI One Belt One Road Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares MSCI One Belt One Road Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares MSCI One Belt One Road Index ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares MSCI One Belt One Road Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares MSCI One Belt One Road Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares MSCI One Belt One Road Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares MSCI One Belt One Road Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares MSCI One Belt One Road Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares MSCI One Belt One Road Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
There is no guarantee that the methodology the Index Provider uses to identify constituents for the Underlying Index will achieve its intended result or provide an accurate assessment of included constituents. The Underlying Index relies on various sources of information to assess the potential constituents of the Underlying Index, including information that may be based on assumptions or estimates. Neither the Fund nor Krane can offer assurances that the Index Provider’s sources of information are reliable. There can be no guarantee that the methodology underlying the Underlying Index, the Underlying Index construction and computation processes, or the daily calculation of the Underlying Index or its methodology will be free from error or that an error will be identified and/or corrected, which may have an adverse impact on the Fund.
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| KraneShares MSCI One Belt One Road Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents s of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares MSCI One Belt One Road Index ETF | Energy Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Energy Sector Risk. Investments in, and/or exposure to, the energy sector, which includes energy commodities such as oil, gasoline, and carbon credits, may be highly volatile and can change quickly and unpredictably due to a number of factors, including the legislative or regulatory changes, adverse market conditions, increased competition affecting the energy sector, financial, accounting and tax matters and other events that the Fund cannot control. In addition, the value of energy commodities may fluctuate widely due to changes in supply and demand.
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| KraneShares MSCI One Belt One Road Index ETF | Materials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Materials Sector Risk. The materials sector includes companies from the following and similar industries: chemicals; metals & mining; paper & forest products; containers & packaging; and construction materials. Many companies in the materials sector are significantly affected by the level and volatility of commodity prices, the exchange value of the dollar, import controls, worldwide competition, environmental policies and consumer demand. At times, worldwide production of industrial materials has exceeded demand as a result of over-building or economic downturns, leading to poor investment returns or losses. Other risks may include liability for environmental damage and general civil liabilities, depletion of resources, and mandated expenditures for safety and pollution control. The materials sector may also be affected by economic cycles, technical progress, labor relations, and government regulations.
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| KraneShares MSCI One Belt One Road Index ETF | Frontier Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Frontier Markets Risk. Frontier markets are those emerging markets that are considered to be among the smallest, least mature and least liquid, and as a result, may be more likely to experience inflation risk, political turmoil and rapid changes in economic conditions than more developed and traditional emerging markets. Investments in frontier markets may be subject to a greater risk of loss than investments in more developed and traditional emerging markets. Frontier markets often have less uniformity in accounting and reporting requirements, unreliable securities valuation and greater risk associated with custody of securities. Economic, political, illiquidity and currency risks may be more pronounced with respect to investments in frontier markets than in emerging markets.
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| KraneShares MSCI One Belt One Road Index ETF | Utilities Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Utilities Sector Risk. Companies in the utilities industry may have difficulty obtaining an adequate return on invested capital, raising capital, and financing large construction programs during periods of inflation or unsettled capital markets; face restrictions on operations and increased cost and delays attributable to environmental considerations and regulation; find that existing plants, equipment or products have been rendered obsolete by technological innovations; and be subject to increased costs because of the scarcity of certain fuels or the effects of man-made disasters. Deregulation is subjecting utility companies to greater competition and may adversely affect profitability. As deregulation allows utility companies to diversify outside of their original geographic regions and their traditional lines of business, utility companies may engage in riskier ventures. Government regulators monitor and control utility operations, revenues and costs, and therefore may limit utility profits. Regulatory authorities may also restrict utility companies’ access to new markets, thereby diminishing these companies’ long-term prospects. Energy conservation and changes in climate policy may have a significant adverse impact on the revenues and expenses of utility companies.
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| KraneShares MSCI One Belt One Road Index ETF | Singapore Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Singapore Risk. Investments in Singaporean issuers involve risks that are specific to Singapore, including legal, regulatory, political, currency and economic risks. In addition, because Singapore’s economy is export-driven, Singapore relies heavily on its trading partners. Political and economic developments of Singapore’s neighbors may have an adverse effect on Singapore’s economy.
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| KraneShares MSCI One Belt One Road Index ETF | South Africa Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | South Africa Risk. Investing in South African securities involves significant risks, including legal, regulatory, currency and economic risks specific to South Africa. Among other things, South Africa’s economy is heavily dependent on its agriculture and mining sectors and thus susceptible to fluctuations in the commodity markets.
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| KraneShares MSCI One Belt One Road Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares MSCI One Belt One Road Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Public-Private AI & Technology ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Public-Private AI & Technology ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares Public-Private AI & Technology ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Public-Private AI & Technology ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Public-Private AI & Technology ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Public-Private AI & Technology ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Public-Private AI & Technology ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Public-Private AI & Technology ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Public-Private AI & Technology ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Public-Private AI & Technology ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Public-Private AI & Technology ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Public-Private AI & Technology ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Public-Private AI & Technology ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund’s investment in private companies is actively-managed and the Fund may not meet its investment objective based on Krane’s or the sub-adviser’s, as applicable, success or failure to implement investment strategies for the Fund for these investments. Krane’s or the sub-adviser’s, as applicable, evaluations and assumptions regarding these investments may not successfully achieve the Fund’s investment objective given actual market conditions. Furthermore, for the portion of the Fund’s assets invested in the Underlying Index, the Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Public-Private AI & Technology ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Public-Private AI & Technology ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Public-Private AI & Technology ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Public-Private AI & Technology ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Public-Private AI & Technology ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Public-Private AI & Technology ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares Public-Private AI & Technology ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Public-Private AI & Technology ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Public-Private AI & Technology ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Public-Private AI & Technology ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Public-Private AI & Technology ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Public-Private AI & Technology ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. For the portion of the Fund’s assets invested in the Underlying Index, the Fund’s return for this portion may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Public-Private AI & Technology ETF | Artificial Intelligence Technology Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Artificial Intelligence Technology Risk. Companies in the artificial intelligence (“AI”) and technology industries typically have high research and capital expenditures and, as a result, their profitability can vary widely, if they are profitable at all. The space in which they are engaged is highly competitive and issuers’ products and services may become obsolete very quickly. These companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. The issuers are also subject to legal, regulatory and political changes that may have a large impact on their profitability. A failure in an issuer’s product or even questions about the safety of the product could be devastating to the issuer, especially if it is the marquee product of the issuer. It can be difficult to accurately capture what qualifies as an AI and Technology company.
Certain AI and Technology companies may face special risks that their products or services may not prove to be commercially successful. Such companies are also strongly affected by worldwide scientific or technological developments. As a result, their products may rapidly become obsolete. Such companies are also often subject to governmental regulation and may, therefore, be adversely affected by governmental policies. In addition, certain of such companies in which the Fund may invest may not currently be profitable and there can be no assurance that such companies will be profitable in the future.
The economy may be significantly impacted by the advanced development and increased regulation of artificial intelligence technologies. As artificial intelligence technologies are used more widely, the profitability and growth of the Fund’s holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which artificial intelligence technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.
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| KraneShares Public-Private AI & Technology ETF | Affiliated Index Provider Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Affiliated Index Provider Risk. The Index Provider is an affiliated person of the Adviser, which poses potential conflicts of interest. For example, a potential conflict could arise between an affiliated person of the Index Provider or the Adviser and each Fund if that entity attempted to use information regarding changes and composition of each Index to the detriment of each Fund. Additionally, potential conflicts could arise with respect to the personal trading activity of personnel of the affiliated person who may have access to, or knowledge of, pending changes to each Index’s composition methodology or the constituent securities in each Index prior to the time that information is publicly disseminated. If shared, such knowledge could facilitate “front-running” (which describes an instance in which other persons trade ahead of each Fund). Although the Adviser and the Index Provider have taken steps designed to ensure that these potential conflicts are mitigated (e.g., via the adoption of policies and procedures that are designed to minimize potential conflicts of interest and the implementation of informational barriers designed to minimize the potential for the misuse of information about the Index), there can be no assurance that such measures will be successful.
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| KraneShares Public-Private AI & Technology ETF | Private Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Private Company Risk. Investments in private companies that have not issued securities in an initial public offering (“IPO”) involve greater risks than investments in securities of companies that trade publicly on an exchange. Investments in these companies are generally less liquid than investments in securities issued by public companies and may be difficult for the Fund to value. Compared to public companies, private companies may have a more limited management group and limited operating histories with narrower, less established product lines and smaller market shares, which may cause them to be more vulnerable to competitors’ actions, market conditions and consumer sentiment with respect to their products or services, as well as general economic downturns. In addition, private companies may have limited financial resources and may be unable to meet their obligations. The Fund may only have limited access to a private company’s actual financial results and there is no assurance that the information obtained by the Fund is reliable. These companies may not ever issue shares in an IPO and a liquid market for their shares may never develop, which could adversely affect the Fund’s liquidity. If the company does issue shares in an IPO, IPOs are risky and volatile and may cause the value of the Fund’s investment to decrease significantly.
Securities issued by private companies, including those that are normally purchased pursuant to Rule 144A or Regulation S promulgated under the Securities Act, have not been registered under the Securities Act and as a result are subject to legal restriction on resale. Such securities typically may be resold only to “qualified institutional buyers,” in a privately negotiated transaction, to a limited number of purchasers or in limited quantities after they have been held for a specified period of time and other conditions are met for an exemption from registration. Because privately-issued securities are not traded on established markets and there may be relatively few potential counterparties for transactions involving such securities, especially under adverse market or economic conditions or in the event of adverse changes in the financial condition of the issuer, the Fund may find it more difficult to purchase or sell such securities in the amounts, at the prices, or at the time the Fund desires than if such securities were more widely held and traded. At times, privately-issued securities may be less liquid, subject to wide fluctuations in value, and may be more difficult to determine the fair value of such securities for purposes of computing the Fund’s NAV, due to the absence of an active trading market. There can be no assurance that a privately-issued security that is deemed to be liquid when purchased will continue to be liquid for as long as it is held by the Fund, and its value may decline as a result or cause the Fund difficulty in meeting shareholder redemptions. The Fund may have to bear the expense of registering privately-issued securities for resale and the risk of substantial delays in effecting the registration.
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| KraneShares Public-Private AI & Technology ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Public-Private AI & Technology ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Public-Private AI & Technology ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Public-Private Emerging Markets Internet and Technology ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in China and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Worsening trade relations between the U.S. and China could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. U.S. Sanctions and worsening trade relations may also result in market volatility and volatility in the price of Fund’s shares.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are traded on Chinese exchanges. Investments in A-Shares are made available to domestic Chinese investors and certain foreign investors, including those who have been approved as a QFI and through the Stock Connect Programs, which currently include the Shanghai-Hong Kong Stock Connect, Shenzhen-Hong Kong Stock Connect, Shanghai-London Stock Connect, and China-Japan Stock Connect. Investments by foreign investors in A-Shares are subject to various restrictions, regulations and limits. Investments in A-Shares are heavily regulated and the recoupment and repatriation of assets invested in A-Shares is subject to restrictions by the Chinese government. A-Shares may be subject to frequent and widespread trading halts and may become illiquid. This could cause volatility in the Fund’s share price and subject the Fund to a greater risk of trading halts.
Custody Risk. In accordance with Chinese regulations and the terms of a QFI license and insofar as Krane acquires a QFI, A-Shares will be held in the joint names of the Fund and Krane. Thus, the Fund’s assets may not be as well protected as they would be if it were possible for them to be registered and held solely in the name of the Fund. There is a risk that creditors of Krane may assert that the securities are owned by Krane and that regulatory actions taken against Krane may affect the Fund.
Hong Kong Risk. The economy of Hong Kong has few natural resources and any fluctuation or shortage in the commodity markets could have a significant adverse effect on the Hong Kong economy. Hong Kong is also heavily dependent on international trade and finance. Additionally, the continuation and success of the current political, economic, legal and social policies of Hong Kong is dependent on and subject to the control of the Chinese government. China may change its policies regarding Hong Kong at any time. Any such change may adversely affect market conditions and the performance of Chinese and Hong Kong issuers and, thus, the value of securities in the Fund’s portfolio.
Stock Connect Program Risk. The Stock Connect Programs are subject to daily quota limitations, and an investor cannot purchase and sell the same security on the same trading day, which may restrict the Fund’s ability to invest in A-Shares through the Programs and to enter into or exit trades on a timely basis. The Shanghai and Shenzhen markets may be open at a time when the participating exchanges located outside of mainland China are not active, with the result that prices of A-Shares may fluctuate at times when the Fund is unable to add to or exit its positions. Only certain China A-Shares are eligible to be accessed through the Stock Connect Programs. Such securities may lose their eligibility at any time, in which case they could be sold but could no longer be purchased through the Stock Connect Programs. Because the Stock Connect Programs are still evolving, the actual effect on the market for trading A-Shares with the introduction of large numbers of foreign investors is still relatively unknown. Further, regulations or restrictions, such as limitations on redemptions or suspension of trading, may adversely impact the program. There is no guarantee that the participating exchanges will continue to support the Stock Connect Programs in the future.
Investments in China A-Shares may not be covered by the securities investor protection programs of either exchange and, without the protection of such programs, will be subject to the risk of default by the broker. Because of the way in which China A-Shares are held in the Stock Connect Programs, the Fund may not be able to exercise the rights of a direct shareholder and may be limited in its ability to pursue claims against the issuer of a security, and may suffer losses in the event the legal or “nominee holder” of the China A-Shares under the Stock Connect Programs becomes insolvent.
Chinese Equity Markets. The use of B-shares, H-shares, N-Shares, Red-Chips, P-Chips, S-Chips by Chinese companies to obtain listings are subject to the political and economic policies in China and the markets on which they are listed. Further, the markets on which these shares are listed may behave very differently from the mainland Chinese markets, and there may be little to no correlation between the performance of the two.
Special Risk Considerations of Investing in China. For purposes of raising capital offshore on exchanges outside of China, including on U.S. exchanges, many Chinese-based operating companies are structured as Variable Interest Entities (“VIEs”). In this structure, the Chinese-based operating company is the VIE and establishes an entity, which is typically offshore in a foreign jurisdiction, such as the Cayman Islands. The offshore entity lists on a foreign exchange and enters into contractual arrangements with the VIE. This structure allows Chinese companies in which the government restricts foreign ownership to raise capital from foreign investors. While the offshore entity has no equity ownership of the VIE, these contractual arrangements permit the offshore entity to consolidate the VIE’s financial statements with its own for accounting purposes and provide for economic exposure to the performance of the underlying Chinese operating company. Therefore, an investor in the listed offshore entity, such as the Fund, will have exposure to the Chinese-based operating company only through contractual arrangements and has no ownership in the Chinese-based operating company. Furthermore, because the offshore entity only has specific rights provided for in these service agreements with the VIE, its abilities to control the activities at the Chinese-based operating company are limited and the operating company may engage in activities that negatively impact investment value. While the VIE structure has been widely adopted, it is not formally recognized under Chinese law and therefore there is a risk that the Chinese government could prohibit the existence of such structures or negatively impact the VIE’s contractual arrangements with the listed offshore entity by making them invalid. If these contracts were found to be unenforceable under Chinese law, investors in the listed offshore entity, such as the Fund, may suffer significant losses with little or no recourse available. If the Chinese government determines that the agreements establishing the VIE structures do not comply with Chinese law and regulations, including those related to restrictions on foreign ownership, it could subject a Chinese-based issuer to penalties, revocation of business and operating licenses, or forfeiture of ownership interest.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Internet Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Internet Companies Risk. Certain Funds invest significantly in Internet companies. Internet companies are subject to rapid changes in technology, hacking or other cyber security events, worldwide competition, rapid obsolescence of products and services, loss of patent protections, cyclical market patterns, evolving industry standards, frequent new product introductions, and the considerable risk of owning small capitalization companies that have recently begun operations. Many Internet companies have incurred large losses since their inception and may continue to incur large losses in the hope of capturing market share and generating future revenues. Accordingly, many such companies expect to incur significant operating losses for the foreseeable future, and may never be profitable. The markets in which many Internet companies compete face rapidly evolving industry standards, frequent new service and product announcements, introductions and enhancements and changing customer demands. The failure of an Internet company to adapt to such changes could have a material adverse effect on the company’s business. In addition, the widespread adoption of new Internet, networking, telecommunications technologies, or other technological changes could require substantial expenditures by an Internet company to modify or adapt its services or infrastructure, which could have a material adverse effect on an Internet company’s business. Internet companies are also especially at risk of hacking and other cybersecurity events.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Foreign Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Foreign Securities Risk. Investments in securities of non-U.S. issuers may be less liquid than investments in U.S. issuers, may have less governmental regulation and oversight, and are typically subject to different investor protection standards than U.S. issuers. Investments in non-U.S. securities entail the risk of loss due to foreign currency fluctuations, political or economic instability, less complete financial information about the issuers, the possible imposition of withholding or confiscatory taxes, the possible seizure or nationalization of foreign holdings, and the possible establishment of exchange controls or freezes on the convertibility of currency. Foreign market trading hours, clearance and settlement procedures, and holiday schedules may limit the Fund’s ability to buy and sell securities. Additionally, foreign issuers may be subject to different accounting, auditing, recordkeeping, and financial reporting requirements. Securities of issuers traded on foreign exchanges may be suspended, either by the issuers themselves, by an exchange or by governmental authorities. If the Fund holds positions in such suspended securities, the Fund may be adversely impacted. Certain countries in which the Fund may invest may be subject to extended settlement delays and/or foreign holidays, during which the Fund will unlikely be able to convert holdings to cash. All of these factors could result in a loss to the Fund.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Currency Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Currency Risk. To the extent that the Fund is exposed directly or indirectly to foreign currencies, including through its investments, or invests in securities or other instruments denominated in or indexed to foreign currencies, changes in currency exchange rates could adversely impact investment gains or add to investment losses. Currency exchange rates may fluctuate significantly over short periods of time and can be affected unpredictably by intervention, or failure to intervene, by U.S. or foreign governments or central banks or by currency controls or political developments in the U.S. or abroad. The Fund may also be subject to delays in converting or transferring U.S. dollars to foreign currencies and vice versa. This may adversely affect the Fund’s performance.
A forward foreign currency contract involves a negotiated obligation to purchase or sell a specific currency at a future date (with or without delivery required), which may be any fixed number of days from the date of the contract agreed upon by the parties, at a price set at the time of the contract. Forward foreign currency contracts are not traded on exchanges; rather, a bank or dealer will act as agent or as principal in order to make or take future delivery, exposing the Fund to counterparty risk.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Small And Mid Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small- and Mid-Capitalization Company Risk. Investing in the securities of small and medium capitalization companies involves greater risk and the possibility of greater price volatility than investing in larger capitalization companies. Since small and medium-sized companies may have limited operating histories, product lines and financial resources, the securities of these companies may be less liquid and more volatile. They may also be sensitive to (expected) changes in interest rates and earnings.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Depositary Receipts Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Depositary Receipts Risk. The Fund may hold the securities of foreign companies in the form of depositary receipts, including American Depositary Receipts and Global Depositary Receipts. Investing in depositary receipts entails the risks associated with foreign investments, such as fluctuations in foreign currency exchange rates and political and economic risks distinct from those associated with investing in the securities of U.S. issuers. In addition, the value of the securities underlying the depositary receipts may change materially when the U.S. markets are not open for trading, which will affect the value of the depositary receipts.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | I P O Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | IPO Risk. Securities issued in IPOs have no trading history, and information about the companies may be available for very limited periods. In addition, the prices of securities sold in IPOs may be highly volatile. At any particular time or from time to time, the Fund may not be able to invest in securities issued in IPOs, or invest to the extent desired, because, for example, only a small portion (if any) of the securities being offered in an IPO may be available to the Fund. In addition, as the Fund increases in size, the impact of IPOs on the Fund’s performance will generally decrease.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | South Korea Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | South Korea Risk. The Fund is susceptible to adverse market, political, regulatory and geographic events affecting South Korea. The South Korean economy is dependent on the economies of other Asian countries, especially China and Southeast Asia, and the United States as key trading partners. South Korea’s economy may be significantly affected by currency fluctuations and increasing competition from Asia’s other low-cost emerging economies. Escalated tensions involving the two nations and the outbreak of hostilities between the two nations, or even the threat of an outbreak of hostilities, could have a severe adverse effect on the South Korean economy. In addition, South Korea’s economic growth potential has recently been on a decline because of a rapidly aging population and structural problems, among other factors.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Taiwan Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Taiwan Risk. Investments in Taiwanese issuers involve risks that are specific to Taiwan, including legal, regulatory, political and economic risks. Political and economic developments of Taiwan’s neighbors may have an adverse effect on Taiwan’s economy. Specifically, Taiwan’s geographic proximity and history of political contention with China have resulted in ongoing tensions, which may materially affect the Taiwanese economy and its securities market and may have an adverse impact on the values of the Fund’s investments in Taiwan, or make such investments impracticable or impossible.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Private Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Private Company Risk. Investments in private companies that have not issued securities in an initial public offering (“IPO”) involve greater risks than investments in securities of companies that trade publicly on an exchange. Investments in these companies are generally less liquid than investments in securities issued by public companies and may be difficult for the Fund to value. Compared to public companies, private companies may have a more limited management group and limited operating histories with narrower, less established product lines and smaller market shares, which may cause them to be more vulnerable to competitors’ actions, market conditions and consumer sentiment with respect to their products or services, as well as general economic downturns. In addition, private companies may have limited financial resources and may be unable to meet their obligations. The Fund may only have limited access to a private company’s actual financial results and there is no assurance that the information obtained by the Fund is reliable. These companies may not ever issue shares in an IPO and a liquid market for their shares may never develop, which could adversely affect the Fund’s liquidity. If the company does issue shares in an IPO, IPOs are risky and volatile and may cause the value of the Fund’s investment to decrease significantly.
Securities issued by private companies, including those that are normally purchased pursuant to Rule 144A or Regulation S promulgated under the Securities Act, have not been registered under the Securities Act and as a result are subject to legal restriction on resale. Such securities typically may be resold only to “qualified institutional buyers,” in a privately negotiated transaction, to a limited number of purchasers or in limited quantities after they have been held for a specified period of time and other conditions are met for an exemption from registration. Because privately-issued securities are not traded on established markets and there may be relatively few potential counterparties for transactions involving such securities, especially under adverse market or economic conditions or in the event of adverse changes in the financial condition of the issuer, the Fund may find it more difficult to purchase or sell such securities in the amounts, at the prices, or at the time the Fund desires than if such securities were more widely held and traded. At times, privately-issued securities may be less liquid, subject to wide fluctuations in value, and may be more difficult to determine the fair value of such securities for purposes of computing the Fund’s NAV, due to the absence of an active trading market. There can be no assurance that a privately-issued security that is deemed to be liquid when purchased will continue to be liquid for as long as it is held by the Fund, and its value may decline as a result or cause the Fund difficulty in meeting shareholder redemptions. The Fund may have to bear the expense of registering privately-issued securities for resale and the risk of substantial delays in effecting the registration.
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| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Public-Private Emerging Markets Internet and Technology ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Sustainable Ultra Short Duration Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Sustainable Ultra Short Duration Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Geographic Focus Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Geographic Focus Risk. The Fund’s investments are expected to be focused in a particular country, countries, or region to approximately the same degree as the Index and therefore the Fund may be susceptible to adverse market, political, regulatory, and geographic events affecting that country, countries or region. Such geographic focus also may subject the Fund to a higher degree of volatility than a more geographically diversified fund.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) the securities in which the collateral is invested may not perform sufficiently to cover the applicable rebate rates paid to borrowers and related administrative costs; (2) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (3) although borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities, there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Sustainable Ultra Short Duration Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| KraneShares Sustainable Ultra Short Duration Index ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, such as when the Fund is subject to delays converting U.S. dollars into a foreign currency to purchase foreign securities and unable to invest in certain constituents of the Underlying Index due to regulatory constraints, trading suspensions, and legal restrictions imposed by foreign governments. To the extent that the Fund employs a representative sampling strategy or calculates its NAV based on fair value prices and the value of the Underlying Index is based on securities’ closing prices on local foreign markets, the Fund’s ability to track the Underlying Index may be adversely affected.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Esg Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ESG Risk. Issuers with businesses with high ESG ratings may be difficult to identify and investments in them maybe volatile. Even companies with high ESG ratings may not necessarily compare favorably with respect to the ESG practices of other issuers. The ESG investment strategy limits the types and number of investment opportunities available and, as a result, the strategy may underperform other strategies that do not have an ESG focus. The ESG investment strategy may result in the Fund’s investing in securities or industry sectors that underperform the market as a whole or underperform other funds screened for ESG standards. Investing based on ESG criteria is qualitative and subjective by nature and there is no guarantee that the criteria used by the Fund will reflect the beliefs or values of any particular investor.
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| KraneShares Sustainable Ultra Short Duration Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Sustainable Ultra Short Duration Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Sustainable Ultra Short Duration Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Securities Lending Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Securities Lending Risk. To the extent the Fund lends its securities, it may be subject to the following risks: (1) borrowers of the Fund’s securities typically provide collateral in the form of cash that is reinvested in securities; (2) the securities in which the collateral is invested may not perform sufficiently to cover the return collateral payments owed to borrowers; (3) delays may occur in the recovery of securities from borrowers, which could interfere with the Fund’s ability to vote proxies or to settle transactions; and (4) there is the risk of possible loss of rights in the collateral should the borrower fail financially. Krane is subject to potential conflicts of interest because the compensation paid to it increases in connection with any net income received by the Fund from the securities lending program.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Real Estate Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Real Estate Sector Risk. The Fund may invest in securities within the real estate sector. Investments in real estate issuers may be volatile. Real estate issuers are susceptible to the risks associated with direct ownership of real estate, including declines in the real estate market, decreases in property revenues, increases in interest rates, increases in property taxes and operating expenses, legal and regulatory changes, a lack of credit or capital, defaults by borrowers or tenants, environmental problems and natural disasters.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Financials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Financials Sector Risk. The performance of companies in the financials sector may be adversely impacted by many factors, including, among others, government regulations, economic conditions, credit rating downgrades, changes in interest rates, and decreased liquidity in credit markets. This sector has experienced significant losses in the recent past, and the impact of more stringent capital requirements and of recent or future regulation on any individual financial company or on the sector as a whole cannot be predicted.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. The Fund may incur a high portfolio turnover rate, which may increase the Fund’s brokerage commission costs, generate net short-term capital gains and negatively impact the Fund’s performance. Regulations require that the portfolio turnover rate be calculated without regard to trades of short-term cash instruments, in-kind transactions or derivatives transactions, which may comprise a significant portion of the Fund’s trading. If such trades were reflected, the calculated portfolio turnover rate may be significantly higher.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Industrials Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Industrials Sector Risk. The industrials sector may be affected by changes in the supply and demand for products and services, product obsolescence, claims for environmental damage or product liability and general economic conditions, among other factors. Government regulation will also affect the performance of investments in such industrials sector issuers, particularly aerospace and defense companies, which rely to a significant extent on government demand for their products and services. Transportation companies, another component of the industrials sector, are subject to sharp price movements resulting from changes in the economy, fuel prices, labor agreements and insurance costs.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, the use of representative sampling strategy, if applicable, asset valuation differences, tax considerations, the unavailability of securities in the Underlying Index from time to time and other liquidity constraints.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Affiliated Index Provider Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Affiliated Index Provider Risk. The Index Provider is an affiliated person of the Adviser, which poses potential conflicts of interest. For example, a potential conflict could arise between an affiliated person of the Index Provider or the Adviser and each Fund if that entity attempted to use information regarding changes and composition of each Index to the detriment of each Fund. Additionally, potential conflicts could arise with respect to the personal trading activity of personnel of the affiliated person who may have access to, or knowledge of, pending changes to each Index’s composition methodology or the constituent securities in each Index prior to the time that information is publicly disseminated. If shared, such knowledge could facilitate “front-running” (which describes an instance in which other persons trade ahead of each Fund). Although the Adviser and the Index Provider have taken steps designed to ensure that these potential conflicts are mitigated (e.g., via the adoption of policies and procedures that are designed to minimize potential conflicts of interest and the implementation of informational barriers designed to minimize the potential for the misuse of information about the Index), there can be no assurance that such measures will be successful.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Dividend Paying Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Dividend Paying Securities Risk. There is no guarantee that the issuers of the stocks held by a fund will pay dividends in the future or that, if dividends are paid, they will remain at their current levels or increase over time. A fund’s emphasis on dividend-paying stocks could cause the fund to underperform similar funds that invest without consideration of a company’s track record of paying dividends or ability to pay dividends in the future. Dividend-paying stocks can fall out of favor with the market (such as in periods of rising interest rates, high inflation and/or strong economic growth) and may not participate in a broad market advance to the same degree as other stocks. A sharp rise in interest rates or economic downturn or other market or company-specific developments could cause a company to reduce or eliminate its dividend.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Ranking Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Ranking Risk. The Underlying Index uses the Value Line® Timeliness and Safety™ Ranking Systems in selecting securities. This is subject to the risk that the rankings may not be accurate and that the performance of these companies may not continue. The returns on these securities may be less than returns on other companies or the overall stock market. In addition, there may be periods when companies highly ranked by Value Line® are out of favor and during which the investment performance of the Fund may suffer.
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| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Value Line(R) Dynamic Dividend Equity Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Wahed Alternative Income Index ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares Wahed Alternative Income Index ETF | Options Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Options Risk. An option is a contract that gives the purchaser (holder) of the option, in return for a premium, the right to buy from (call) or sell to (put) the seller (writer) of the option the security or currency underlying the option at a specified exercise price at any time during the term of the option (normally not exceeding nine months). The writer of an option has the obligation upon exercise of the option by its purchaser to deliver the underlying security or currency upon payment of the exercise price or to pay the exercise price upon delivery of the underlying security or currency. Options are derivatives, which, as described above, can be illiquid and can imperfectly correlate with the reference asset(s).
The use of options involves investment strategies and risks different from those associated with ordinary portfolio securities transactions. The prices of options are volatile and are influenced by, among other things, actual and anticipated changes in the value of the underlying instrument, or in interest or currency exchange rates, including the anticipated volatility of the underlying instrument (known as implied volatility), which in turn are affected by the performance of the issuer of the underlying instrument, by the time remaining until the expiration of the option contract, by fiscal and monetary policies and by national and international political and economic events. As such, prior to the exercise or expiration of the option, the Fund is exposed to implied volatility risk, meaning the value, as based on implied volatility, of an option may increase due to market and economic conditions or views based on the sector or industry in which issuers of the underlying instrument participate, including company-specific factors.
Any FLEX options written by the Fund will be exercisable at their strike price only on their expiration date. The options purchased by the Fund will be exercisable at their strike price either on their expiration date or at any time. Since the options held by the Fund do not expire until approximately two years after the commencement of the Outcome Period, the degree of non-correlation between the value of the options and the secondary market share price of the Underlying ETF will be higher when compared to options with shorter terms. As an option approaches its expiration date, its value typically will increasingly correlate with the price of Underlying ETF shares. Farther in advance of the expiration date, the value of the options may vary because related factors other than the value of the Underlying ETF influence the value. For example, the value of the options will be influenced by interest rate changes, the secondary market share price of the Underlying ETF and implied volatility levels of the Underlying ETF, among other factors. For the same reasons, the value of the options held by the Fund is not expected to increase or decrease to the same degree as the Underlying ETF’s secondary market share price on a day-to-day basis.
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| KraneShares Wahed Alternative Income Index ETF | Clearing Member Default Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Clearing Member Default Risk. Transactions in some types of derivatives, including options, are required to be centrally cleared (“cleared derivatives”). In a transaction involving cleared derivatives, the Fund’s counterparty is a clearing house, such as the OCC, rather than a bank or broker. Since the Fund is not a member of clearing houses and only members of a clearing house (“clearing members”) can participate directly in the clearing house, the Fund will hold cleared derivatives through accounts at clearing members. In cleared derivatives positions, the Fund will make payments (including margin payments) to, and receive payments from, a clearing house through their accounts at clearing members. Customer funds held at a clearing organization in connection with any option contracts are held in a commingled omnibus account and are not identified to the name of the clearing member’s individual customers. As a result, assets deposited by the Fund with any clearing member as margin for its options may, in certain circumstances, be used to satisfy losses of other clients of the Fund’s clearing member. In addition, although clearing members guarantee performance of their clients’ obligations to the clearing house, there is a risk that the assets of the Fund might not be fully protected in the event of the clearing member’s bankruptcy. The Fund is also subject to the risk that a limited number of clearing members are willing to transact on the Fund’s behalf, which heightens the risks associated with a clearing member’s default. If a clearing member defaults the Fund could lose some or all of the benefits of a transaction entered into by the Fund with the clearing member. The loss of a clearing member for the Fund to transact with could result in increased transaction costs and other operational issues that could impede the Fund’s ability to implement its investment strategy. If the Fund cannot find a clearing member to transact with on the Fund’s behalf, the Fund may be unable to effectively implement its investment strategy.
The OCC acts as guarantor and central counterparty with respect to the options. As a result, the ability of the Fund to meet its objective depends on the OCC being able to meet its obligations. In the event an OCC clearing member that is a counterparty of the Fund were to become insolvent, the Fund may have some or all of its options closed without its consent or may experience delays or other difficulties in attempting to close or exercise its affected options positions, both of which would impair the Fund’s ability to execute its investment strategy. In the unlikely event that the OCC becomes insolvent or is otherwise unable to meet its settlement obligations, the Fund could suffer significant losses.
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| KraneShares Wahed Alternative Income Index ETF | Equity Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Equity Securities Risk. The values of equity securities are subject to factors such as market fluctuations, changes in interest rates and perceived trends in stock prices. Equity securities may be more volatile than other asset classes and are generally subordinate in rank to debt and other securities of the same issuer.
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| KraneShares Wahed Alternative Income Index ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares Wahed Alternative Income Index ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares Wahed Alternative Income Index ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares Wahed Alternative Income Index ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares Wahed Alternative Income Index ETF | Large Capitalization Company Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Large Capitalization Company Risk. Large capitalization companies may be unable to respond quickly to new competitive challenges and attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion. As such, returns on investments in stocks of large capitalization companies could trail the returns on investments in stocks of small and mid capitalization companies.
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| KraneShares Wahed Alternative Income Index ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Management Risk. The Fund may not fully replicate the Underlying Index and may hold less than the total number of securities in the Underlying Index. Therefore, the Fund is subject to the risk that Krane’s security selection process may not produce the intended results.
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| KraneShares Wahed Alternative Income Index ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares Wahed Alternative Income Index ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund may not be readily available, and such investments may be fair valued or valued by a pricing service at an evaluated price. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund. Such differences could be significant, particularly for illiquid securities and securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| KraneShares Wahed Alternative Income Index ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] |
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| KraneShares Wahed Alternative Income Index ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares Wahed Alternative Income Index ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares Wahed Alternative Income Index ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares Wahed Alternative Income Index ETF | Information Technology Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Information Technology Sector Risk. Market or economic factors impacting information technology companies and companies that rely heavily on technology advances could have a major effect on the value of stocks in the information technology sector. The value of stocks of technology companies and companies that rely heavily on technology is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from competitors with lower production costs. Information technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel.
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| KraneShares Wahed Alternative Income Index ETF | Passive Investment And Index Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Passive Investment and Index Risk. There is no guarantee that the Underlying Index will create the desired exposure and the Fund is not actively managed. It does not seek to “beat” the Underlying Index or take temporary defensive positions when markets decline. Therefore, the Fund may purchase or hold securities with current or projected underperformance.
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| KraneShares Wahed Alternative Income Index ETF | Tracking Error Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Tracking Error Risk. The Fund’s return may not match or achieve a high degree of correlation with the return of the Underlying Index. This may be due to, among other factors, the Fund holding cash under certain circumstances in lieu of Underlying Index securities, the use of representative sampling strategy, if applicable, asset valuation differences, tax considerations, the unavailability of securities in the Underlying Index from time to time and other liquidity constraints.
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| KraneShares Wahed Alternative Income Index ETF | Shariahcompliant Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Shariah-Compliant Investing Risk. The consideration of Islamic principles by the Underlying Index restricts the Fund’s ability to invest in certain types of issuers and securities, such as financial companies and conventional fixed income securities (i.e., bonds and other structured securities that give a fixed return based on an obligation or promise), and reduces the size of the universe of eligible securities in which the Underlying Index can invest. As a result, the successful implementation of the Fund’s investment strategy may limit its investment opportunities and adversely affect its performance. Because Islamic principles preclude investment in interest-paying instruments, any cash or cash equivalents the Fund holds will not earn interest income. In addition, there is a risk that a security which is currently Shariah-complaint may become non-compliant after purchase and such securities may be held until the Underlying Index reconstitutes.
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| KraneShares Wahed Alternative Income Index ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Wahed Alternative Income Index ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares Wahed Alternative Income Index ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Interest Rate Volatility and Inflation Hedge ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
The regulation of derivatives, including under Rule 18f-4 under the 1940 Act, is an evolving area of law; legislative, regulatory or judicial developments (including revisions to or rescission of existing rules) could limit the availability of, restrict the Fund’s use of, or increase the costs of, the derivative instruments used by the Fund, which could prevent the Fund from implementing its principal investment strategies.
The derivative instruments and techniques that the Fund may principally use include the following risks:
Options Risk. If the Fund buys an option, it buys a legal contract giving it the right to buy or sell a specific amount of the underlying instrument or swap on the underlying instrument at an agreed-upon price typically in exchange for a premium paid by the Fund. In general, most options on interest rate swaps are “European-style” options, which means that they can only be exercised at the end of the option term. A decision as to whether, when and how to use options involves the exercise of skill and judgment and even a well-conceived option transaction may be unsuccessful because of market behavior or unexpected events. The prices of options can be highly volatile and the use of options can lower total returns.
OTC options generally have more flexible terms negotiated between the buyer and the seller, but the counterparties may be required to post “variation margin” as frequently as daily to reflect any gains or losses in such options contracts. Where, as here, such variation margin is not required to be posted, such instruments are generally subject to greater credit risk and counterparty risk, which is the risk that the other party to the derivative will fail to make required payments or otherwise comply with the terms of the option. Counterparty risk may arise because of market activities and developments, the counterparty’s financial condition (including financial difficulties, bankruptcy, or insolvency), or other reasons. OTC instruments also may be subject to greater liquidity risk.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Because a portion of the Fund’s portfolio consists of OTC instruments that are typically subject to wider bid-offer spreads than exchange-traded instruments, the Fund’s shares may trade at a larger premium or discount to NAV than ETFs that hold only exchange-traded instruments, and such premium or discount could affect shareholders differently: a shareholder that purchases shares at a premium may experience a disproportionate loss if the shares subsequently trade at a discount, and shareholders transacting in the secondary market may experience results that differ from those of Authorized Participants transacting at NAV. Further, any of the fund’s assets and investments may be halted or restricted, whether as a result of extraordinary market volatility, regulatory action, technical failures or otherwise. In addition, dealers in OTC instruments may reduce or suspend market-making activity during periods of market stress. Under such circumstances, the Fund may be unable to establish, adjust, roll or exit positions promptly.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. The Fund may acquire a position in large size that may make its positions more difficult to liquidate and increase liquidity risk. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective. The Sub-Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions. The Sub-Adviser’s investment process is fully discretionary and reflects judgment regarding the selection, structure, execution, sizing, timing and rolling of the Fund’s options positions, use of cash, allocation to duration; it is not a quantitative model, algorithm or index, and portfolio decisions are not mechanical or formulaic. The individual investments and instruments selected for the Fund may not perform as expected or may be bought or sold at inopportune times, and the Fund may underperform funds with similar investment objectives or strategies. Even investment decisions that are well-conceived when made may prove unsuccessful because of subsequent market behavior or unexpected events. There is no assurance that the Sub-Adviser’s judgments will prove correct. In addition, hedging positions, even when successful in mitigating the risks they target, may not prevent losses to the Fund and may reduce or eliminate gains that would otherwise have been available to the Fund without the options overlay and use of cash.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund, including OTC instruments, may not be readily available, and such investments may be fair valued or valued by a pricing service, dealer, or third-party sources deemed to be reliable by the fund administrator at an evaluated price. Over-the-counter (“OTC”) options are valued by the Administrator based upon prices determined by the applicable independent, third-party pricing agent. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund, and it is possible that the Fund would incur a loss because a position is sold at a discount to the valuation held by the Fund at that time. Such differences could be significant, particularly for securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. To qualify for the favorable U.S. federal income tax treatment accorded to a regulated investment company (“RIC”) under the Internal Revenue Code of 1986, as amended (the “Code”), the Fund must satisfy certain income, asset diversification and distribution requirements each year. Among other requirements, the Fund must derive at least 90% of its gross income each taxable year from certain qualifying sources of income and the Fund’s assets must be diversified so that at least 50% of the value of the Fund’s total assets is represented by cash and cash items, U.S. government securities, securities of other RICs, and other securities, subject to certain other limitations (see the “Taxes” section in the SAI for additional information). The Fund’s investments in certain rate-linked derivative instruments (such as rate-linked options) may generate income that is not qualifying income and such investments may not be treated as investments in “securities” for purposes of the asset diversification requirement. The Fund will also need to manage its exposure to derivatives counterparties for purposes of satisfying the diversification test. If the Fund were to fail to meet the qualifying income test or asset diversification test and fail to qualify as a RIC, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income, which would adversely affect the Fund’s performance. The failure by the Fund to qualify as a RIC would have significant negative tax consequences to Fund shareholders and would significantly and adversely affect a shareholder’s return on its investment in the Fund. Under certain circumstances, the Fund may be able to cure a failure to meet the qualifying income test or asset diversification test if such failure was due to reasonable cause and not willful neglect, but to do so the Fund may incur significant fund-level taxes, which would effectively reduce (and could eliminate) the Fund’s returns.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Investing in fixed income securities subjects the Fund to the following risks:
Credit Risk. Credit risk refers to the possibility that the issuer of a security will not be able to make payments of interest and principal when due. Changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of an investment in that issuer.
Event Risk. Event risk is the risk that an unexpected event could interfere with an issuer’s ability to make timely interest or principal payments or that causes market speculation about the issuer’s ability to make such payments, which could cause the credit quality and market value of an issuer’s bonds and/or other debt securities to decline significantly.
Interest Rate Risk. Generally, the value of fixed income securities will change inversely with changes in interest rates. As interest rates rise, the market value of fixed income securities tends to decrease. Conversely, as interest rates fall, the market value of fixed income securities tends to increase. This risk will be greater for long-term securities than for short-term securities. Changes in monetary policy, which can be difficult to predict, may heighten the level of interest rate risk for the Fund.
Maturity Risk. The value of the Fund’s fixed income investments is also dependent on their maturity. Generally, the longer the maturity of a fixed income security, the greater its sensitivity to changes in interest rates.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | U S Government Obligations Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect the Fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. Additionally, market prices and yields of securities supported by the full faith and credit of the U.S. government or other countries may decline or be negative for short or long periods of time.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Hedging Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Hedging Risk. The Fund seeks to mitigate (or hedge) the risk associated with the potential impact of a steepening U.S. interest rate curve (“curve risk”), an increase in inflation and inflation expectations, and an increase in interest rate volatility on the performance of U.S. government bonds. The Fund does not seek to mitigate credit risk, non-curve interest rate risk, or other factors influencing the price of U.S. government bonds, which factors may have a greater impact on the bonds’ returns than the U.S. interest rate curve or inflation. Further, there is no guarantee that the Fund’s investments will eliminate or mitigate curve risk, inflation risk or the potential impact of interest rate volatility on long positions in U.S. government bonds. If interest rates rise in parallel within the U.S. interest rate curve, the Fund will not be hedged. In addition, when the U.S. interest rate curve flattens or inverts, the Fund’s investments in options may lose value or end up worthless. Under such circumstances, the Fund will generally underperform a portfolio comprised solely of U.S. government bonds (without the options owned by the Fund). In a flattening or inverted curve environment, the Fund’s hedging strategy could result in disproportionately larger losses in the Fund’s options as compared to gains or losses in its U.S. government bond positions attributable to interest rate changes. There is no guarantee that the Fund will have positive returns, even in environments of sharply rising inflation rates in which the Fund’s options might be expected to mitigate the effects of such rises. The Fund will incur expenses when entering into positions in rate-linked options. Moreover, to the extent that curve risk has been priced into the U.S. government bonds owned by the Fund, the Fund will underperform other investments even during periods of curve steepening.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Return Of Capital Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Return of Capital Risk. Historically, a portion of the Fund’s distributions have been treated as a return of capital for tax purposes. Return of capital distributions are not taxable income to you but reduce your tax basis in your shares of the Fund. Such a reduction in tax basis will result in larger taxable gains and/or lower tax losses on a subsequent sale of shares of the Fund. There is no guarantee that the character of the Fund’s distributions will be similar in the future.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Rate Linked Derivatives Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Rate-Linked Derivatives Investment Risk. The Fund’s exposure to derivatives tied to interest rates subjects the Fund to greater volatility than investments in traditional securities, such as stocks and bonds. Investing in derivatives tied to interest rates, including through options tied to the shape of the U.S. interest rate curve, can be extremely volatile. The value of such investments may fluctuate rapidly based on a variety of factors, including overall market movements; economic events and policies; changes in interest rates or inflation rates; changes in monetary and exchange control programs; war; acts of terrorism; natural disasters; and technological developments. The Fund is expected to benefit from the options it holds if the U.S. interest rate curve steepens during the time period in which the Fund holds the options. However, if the U.S. interest rate curve flattens or inverts, the Fund will lose money on the options, up to the amount invested in option premiums, and underperform an otherwise identical bond fund that had not used such options. Rate-linked derivatives may lose money if interest rates change in a manner not anticipated by the Sub-Adviser.
An increase in interest rates may cause the value of securities held directly or indirectly by the Fund to decline to the extent that the increase is not linked to a steepening of the U.S. interest rate curve or the Fund’s hedging strategy is not effectively implemented. Even if the Fund is hedged against losses due to interest rate increases linked to U.S. interest rate curve steepening, outright interest rate increases may lead to heightened volatility in the fixed-income markets and may positively affect the value of the Fund’s options while negatively impacting the Fund’s investments in TIPS.
There can be no assurance that the Fund’s interest-rate linked options will accurately deliver positive returns if inflation experienced in the United States or the rate of expected future inflation reflected in the prices and yields of bonds held by the Fund rises. The Fund could lose money on the options held by the Fund, and the present value of the Fund’s portfolio investments could decrease if inflation increases. These interest rate-linked options may also cause the Fund’s net asset value and returns to be more volatile and expose the Fund to increased counterparty risk. Fluctuations in the steepness of the U.S. interest rate curve or the price of the options owned by the Fund could materially adversely affect an investment in the Fund.
The Fund’s investments in options are not intended to mitigate duration and credit risk or other factors influencing the price of U.S. government bonds, which may have a greater impact on the bonds’ returns than curve risk. Moreover, to the extent that curve risk has been priced into the government bonds owned directly or indirectly by the Fund, the Fund could underperform other investments even during inflationary periods. There is no guarantee that the Fund will have positive performance even in environments of sharply rising inflation. There is no guarantee that the Fund will be able to successfully mitigate inflation risk or that bond values and interest rates will match changes in inflation rates.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Tips Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | TIPS Risk. U.S. Treasury Inflation-Protected Securities (“TIPS”) are debt instruments issued by the by the United States Department of the Treasury. The principal of TIPS increases with inflation and decreases with deflation, as measured by the Consumer Price Index (“CPI”). When TIPS mature, investors are paid the adjusted principal or original principal, whichever is greater. Interest payments on TIPS are unpredictable and will fluctuate as the principal and corresponding interest payments are adjusted for inflation. Inflation-indexed bonds generally pay a lower nominal interest rate than a comparable non-inflation-indexed bond. There can be no assurance that the CPI will accurately measure the real rate of inflation in the prices of goods and services. Any increases in the principal amount of TIPS will be considered taxable ordinary income, even though the Fund or applicable underlying ETF will not receive the principal until maturity. As a result, the Fund may make income distributions to shareholders that exceed the cash it receives. In addition, TIPS are subject to credit risk, interest rate risk, and maturity risk.
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| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Interest Rate Volatility and Inflation Hedge ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Deflation ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| Quadratic Deflation ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (OTC) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
The regulation of derivatives, including under Rule 18f-4 under the 1940 Act, is an evolving area of law; legislative, regulatory or judicial developments (including revisions to or rescission of existing rules) could limit the availability of, restrict the Fund’s use of, or increase the costs of, the investments, assets and instruments used by the Fund, which could prevent the Fund from implementing its principal investment strategies.
The derivative instruments and techniques that the Fund may principally use include the following risks:
Options Risk. If the Fund buys an option, it buys a legal contract giving it the right to buy or sell a specific amount of the underlying instrument or swap on the underlying instrument at an agreed-upon price typically in exchange for a premium paid by the Fund. In general, most options on interest rate swaps are “European-style” options, which means that they can only be exercised at the end of the option term. A decision as to whether, when and how to use options involves the exercise of skill and judgment and even a well-conceived option transaction may be unsuccessful because of market behavior or unexpected events. The prices of options can be highly volatile and the use of options can lower total returns.
OTC options generally have more flexible terms negotiated between the buyer and the seller, but the counterparties may be required to post “variation margin” as frequently as daily to reflect any gains or losses in such options contracts. Where, as here, such variation margin is not required to be posted, such instruments are generally subject to greater credit risk and counterparty risk, which is the risk that the other party to the derivative will fail to make required payments or otherwise comply with the terms of the option. Counterparty risk may arise because of market activities and developments, the counterparty’s financial condition (including financial difficulties, bankruptcy, or insolvency), or other reasons. OTC instruments also may be subject to greater liquidity risk.
Options Strategies Risk. The options strategies used by the Fund may involve writing covered options and are structured as long call spreads, long put spreads or long butterflies. If there is a broad market move, the strategies may not have the same return as a strategy composed of only long options. The Fund will pay a premium for its options strategies and they are structured to limit the potential loss to the Fund to the market value of the options strategy; however, there is no guarantee that this will occur. If an option that the Fund has purchased is never exercised or closed out, the Fund will lose the amount of the premium it paid and any post-purchase appreciation in value and the use of those funds.
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| Quadratic Deflation ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| Quadratic Deflation ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Because a portion of the Fund’s portfolio consists of OTC instruments that are typically subject to wider bid-offer spreads than exchange-traded instruments, the Fund’s shares may trade at a larger premium or discount to NAV than ETFs that hold only exchange-traded instruments, and such premium or discount could affect shareholders differently: a shareholder that purchases shares at a premium may experience a disproportionate loss if the shares subsequently trade at a discount, and shareholders transacting in the secondary market may experience results that differ from those of Authorized Participants transacting at NAV. Further, any of the fund’s assets and investments may be halted or restricted, whether as a result of extraordinary market volatility, regulatory action, technical failures or otherwise. In addition, dealers in OTC instruments may reduce or suspend market-making activity during periods of market stress. Under such circumstances, the Fund may be unable to establish, adjust, roll or exit positions promptly.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
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| Quadratic Deflation ETF | Liquidity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Liquidity Risk. The Fund’s investments are subject to liquidity risk, which exists when an investment is or becomes difficult or impossible to purchase or sell at an advantageous time and price. If a transaction is particularly large or if the relevant market is or becomes illiquid, it may not be possible to initiate a transaction or liquidate a position, which may cause the Fund to suffer significant losses and difficulties in meeting redemptions. Liquidity risk may be the result of, among other things, market turmoil, the reduced number and capacity of traditional market participants, or the lack of an active trading market. Markets for securities or financial instruments could be disrupted by a number of events, including, but not limited to, an economic crisis, natural disasters, new legislation or regulatory changes inside or outside the U.S. Liquid investments may become less liquid after being purchased by the Fund, particularly during periods of market stress. The Fund may acquire a position in large size that may make its positions more difficult to liquidate and increase liquidity risk. In addition, if a number of securities held by the Fund stop trading, it may have a cascading effect and cause the Fund to halt trading. Volatility in market prices will increase the risk of the Fund being subject to a trading halt.
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| Quadratic Deflation ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective. The Sub-Adviser’s evaluations and assumptions regarding investments, interest rates, inflation, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions. The Sub-Adviser’s investment process is fully discretionary and reflects judgment regarding the selection, structure, execution, sizing, timing and rolling of the Fund’s options positions, use of cash, allocation to duration; it is not a quantitative model, algorithm or index, and portfolio decisions are not mechanical or formulaic. The individual investments and instruments selected for the Fund may not perform as expected or may be bought or sold at inopportune times, and the Fund may underperform funds with similar investment objectives or strategies. Even investment decisions that are well-conceived when made may prove unsuccessful because of subsequent market behavior or unexpected events. There is no assurance that the Sub-Adviser’s judgments will prove correct. In addition, hedging positions, even when successful in mitigating the risks they target, may not prevent losses to the Fund and may reduce or eliminate gains that would otherwise have been available to the Fund without the options overlay and use of cash.
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| Quadratic Deflation ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| Quadratic Deflation ETF | Valuation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Valuation Risk. Independent market quotations for certain investments held by the Fund, including OTC instruments, may not be readily available, and such investments may be fair valued or valued by a pricing service, dealer, or third-party sources deemed to be reliable by the fund administrator at an evaluated price. Over-the-counter (“OTC”) options are valued by the Administrator based upon prices determined by the applicable independent, third-party pricing agent. These valuations involve subjectivity and different market participants may assign different prices to the same investment. As a result, there is a risk that the Fund may not be able to sell an investment at the price assigned to the investment by the Fund, and it is possible that the Fund would incur a loss because a position is sold at a discount to the valuation held by the Fund at that time. Such differences could be significant, particularly for securities that trade in relatively thin markets and/or markets that experience extreme volatility. In addition, the securities in which the Fund invests may trade on days that the Fund does not price its shares; as a result, the value of Fund shares may change on days when investors cannot purchase or sell their Fund holdings.
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| Quadratic Deflation ETF | Large Shareholder Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] |
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| Quadratic Deflation ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. To qualify for the favorable U.S. federal income tax treatment accorded to a regulated investment company (“RIC”) under the Internal Revenue Code of 1986, as amended (the “Code”), the Fund must satisfy certain income, asset diversification and distribution requirements each year. Among other requirements, the Fund must derive at least 90% of its gross income each taxable year from certain qualifying sources of income and the Fund’s assets must be diversified so that at least 50% of the value of the Fund’s total assets is represented by cash and cash items, U.S. government securities, securities of other RICs, and other securities, subject to certain other limitations (see the “Taxes” section in the SAI for additional information). The Fund’s investments in certain rate-linked derivative instruments (such as rate-linked options) may generate income that is not qualifying income and such investments may not be treated as investments in “securities” for purposes of the asset diversification requirement. The Fund will also need to manage its exposure to derivatives counterparties for purposes of satisfying the diversification test. If the Fund were to fail to meet the qualifying income test or asset diversification test and fail to qualify as a RIC, it would be taxed in the same manner as an ordinary corporation, and distributions to its shareholders would not be deductible by the Fund in computing its taxable income, which would adversely affect the Fund’s performance. The failure by the Fund to qualify as a RIC would have significant negative tax consequences to Fund shareholders and would significantly and adversely affect a shareholder’s return on its investment in the Fund. Under certain circumstances, the Fund may be able to cure a failure to meet the qualifying income test or asset diversification test if such failure was due to reasonable cause and not willful neglect, but to do so the Fund may incur significant fund-level taxes, which would effectively reduce (and could eliminate) the Fund’s returns.
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| Quadratic Deflation ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| Quadratic Deflation ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| Quadratic Deflation ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| Quadratic Deflation ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Investing in fixed income securities subjects the Fund to the following risks:
Credit Risk. Credit risk refers to the possibility that the issuer of a security will not be able to make payments of interest and principal when due. Changes in an issuer’s credit rating or the market’s perception of an issuer’s creditworthiness may also affect the value of an investment in that issuer.
Event Risk. Event risk is the risk that an unexpected event could interfere with an issuer’s ability to make timely interest or principal payments or that causes market speculation about the issuer’s ability to make such payments, which could cause the credit quality and market value of an issuer’s bonds and/or other debt securities to decline significantly.
Interest Rate Risk. Generally, the value of fixed income securities will change inversely with changes in interest rates. As interest rates rise, the market value of fixed income securities tends to decrease. Conversely, as interest rates fall, the market value of fixed income securities tends to increase. This risk will be greater for long-term securities than for short-term securities. Changes in monetary policy, which can be difficult to predict, may heighten the level of interest rate risk for the Fund.
Maturity Risk. The value of the Fund’s fixed income investments is also dependent on their maturity. Generally, the longer the maturity of a fixed income security, the greater its sensitivity to changes in interest rates.
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| Quadratic Deflation ETF | U S Government Obligations Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | U.S. Government Obligations Risk. Obligations of U.S. Government agencies and authorities receive varying levels of support and may not be backed by the full faith and credit of the U.S. Government, which could affect the Fund’s ability to recover should they default. No assurance can be given that the U.S. Government will provide financial support to its agencies and authorities if it is not obligated by law to do so. Additionally, market prices and yields of securities supported by the full faith and credit of the U.S. government or other countries may decline or be negative for short or long periods of time.
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| Quadratic Deflation ETF | Hedging Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Hedging Risk. The Fund seeks to mitigate (or hedge) the risk associated with the potential impact of a flattening or inverting U.S. interest rate curve (“curve risk”), deflation and deflationary expectations, and an increase in interest rate volatility on the performance of U.S. government bonds. The Fund does not seek to mitigate credit risk, non-curve interest rate risk, or other factors influencing the price of U.S. government bonds, which factors may have a greater impact on the bonds’ returns than the U.S. interest rate curve or deflation. Further, there is no guarantee that the Fund’s investments will eliminate or mitigate curve risk, deflation risk on long positions in U.S. government bonds. If interest rates increase in parallel within the U.S. interest rate curve, the Fund will not be hedged. In addition, when the U.S. interest rate curve steepens, the Fund’s investments in options may lose value or end up worthless. Under such circumstances, the Fund will generally underperform a portfolio comprised solely of U.S. government bonds (without the options owned by the Fund). In a steepening curve environment, the Fund’s hedging strategy could result in disproportionately larger losses in the Fund’s options as compared to gains or losses in its U.S. government bond positions attributable to interest rate changes. There is no guarantee that the Fund will have positive returns, even in environments of sharply declining inflation rates. The Fund will incur expenses when entering into positions in rate-linked options. Moreover, to the extent that curve risk has been priced into the U.S. government bonds owned by the Fund, the Fund will underperform other investments even during periods of curve flattening.
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| Quadratic Deflation ETF | Return Of Capital Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Return of Capital Risk. Historically, a portion of the Fund’s distributions have been treated as a return of capital for tax purposes. Return of capital distributions are not taxable income to you but reduce your tax basis in your shares of the Fund. Such a reduction in tax basis will result in larger taxable gains and/or lower tax losses on a subsequent sale of shares of the Fund. There is no guarantee that the character of the Fund’s distributions will be similar in the future.
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| Quadratic Deflation ETF | Rate Linked Derivatives Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Rate-Linked Derivatives Investment Risk. The Fund’s exposure to derivatives tied to interest rates subjects the Fund to greater volatility than investments in traditional securities, such as stocks and bonds. Investing in derivatives tied to interest rates, including through options tied to the shape of the U.S. interest rate curve, can be extremely volatile. The value of such investments may fluctuate rapidly based on a variety of factors, including overall market movements; economic events and policies; changes in interest rates or inflation rates; changes in monetary and exchange control programs; war; acts of terrorism; natural disasters; and technological developments. The Fund is expected to benefit from the options it holds if the U.S. interest rate curve flattens or inverts during the time period in which the Fund holds the options. However, if the U.S. interest rate curve steepens, the Fund will lose money on the options, up to the amount invested in option premiums, and underperform an otherwise identical bond fund that had not used such options. Rate-linked derivatives may lose money if interest rates change in a manner not anticipated by the Sub-Adviser.
An increase in interest rates may cause the value of securities held directly or indirectly by the Fund to decline to the extent that the increase is not linked to a flattening or inverting of the U.S. interest rate curve or the Fund’s hedging strategy is not effectively implemented. Even if the Fund is hedged against losses due to interest rate increase linked to U.S. interest rate curve flattening or inverting, outright interest rate increases may lead to heightened volatility in the fixed-income markets and may positively affect the value of the Fund’s options while negatively impacting the Fund’s investments in Treasuries.
There can be no assurance that the Fund’s interest-rate linked options will accurately deliver positive returns if deflation experienced in the United States or the rate of expected future inflation reflected in the prices and yields of bonds held by the Fund declines. The Fund could lose money on the options held by the Fund, and the present value of the Fund’s portfolio investments could decrease if deflation occurs. These interest rate-linked options may also cause the Fund’s net asset value and returns to be more volatile and expose the Fund to increased counterparty risk. Fluctuations in the steepness of the U.S. interest rate curve or the price of the options owned by the Fund could materially adversely affect an investment in the Fund.
The Fund’s investments in options are not intended to mitigate duration and credit risk or other factors influencing the price of U.S. government bonds, which may have a greater impact on the bonds’ returns than curve risk. Moreover, to the extent that curve risk has been priced into the government bonds owned directly or indirectly by the Fund, the Fund could underperform other investments even during deflationary periods. There is no guarantee that the Fund will have positive performance even in environments of sharply declining inflation. There is no guarantee that the Fund will be able to successfully mitigate deflation risk or that bond values and interest rates will match changes in inflation rates.
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| Quadratic Deflation ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all exchange traded funds (“ETFs”), a shareholder of the Fund is subject to the risk that his or her investment could lose money. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Deflation ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Quadratic Deflation ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BABA Daily ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares 2x Long BABA Daily ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 2x Long BABA Daily ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in the People’s Republic of China (“China” or the “PRC”) and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. Investments in Chinese securities, including those that are Hong Kong-listed and U.S.-listed securities, subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations and higher rates of inflation. China has experienced security concerns, such as terrorism and strained international relations. Incidents involving China’s or the region’s security may cause uncertainty in Chinese markets and may adversely affect the Chinese economy and the Fund’s investments.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. In addition, worsening trade relations between the two countries could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. This may also result in market volatility and volatility in the price of Fund shares.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers. Chinese companies with securities listed on U.S. exchanges may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements or due to worsening relations between the U.S. and China, which would significantly decrease the liquidity and value of the securities.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
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| KraneShares 2x Long BABA Daily ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 2x Long BABA Daily ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 2x Long BABA Daily ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 2x Long BABA Daily ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 2x Long BABA Daily ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 2x Long BABA Daily ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund. Krane’s evaluations and assumptions regarding investments, markets, trends, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 2x Long BABA Daily ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 2x Long BABA Daily ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 2x Long BABA Daily ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 2x Long BABA Daily ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 2x Long BABA Daily ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 2x Long BABA Daily ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares 2x Long BABA Daily ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active secondary market trading of the Fund’s shares could cause more frequent creation and redemption activities, which would increase the number of portfolio transactions. High levels of portfolio transactions may cause higher transaction costs because of increased broker commissions resulting from such transactions and increased taxable capital gains. The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise most of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| KraneShares 2x Long BABA Daily ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares 2x Long BABA Daily ETF | Alibaba Group Holding Limited Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Alibaba Group Holding Limited Investing Risk. Issuer-specific attributes may cause an investment held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. As of the date of this prospectus, in addition to the risks associated with companies in the technology sector, the issuer faces risks associated with: the highly competitive nature of the e-commerce industry; economic and market uncertainty; reductions in demand for its products; potential concentration of revenues in a few large clients; geopolitical events and pandemics; adequate protection of technology or other intellectual property; exchange rates; reliance on third parties to manufacture products; possible shortages of equipment or materials needed to manufacture products; cybersecurity attacks and data breaches; system failures or outages; potential incompatibility of product with some or all industry standard software and hardware; increases in costs; adverse government regulations; regulatory compliance costs; litigation; taxes; indebtedness; and the ability to attract and retain high quality talent.
The Underlying Stock is subject to many risks that can negatively impact its revenue and viability including, but are not limited to price volatility risk, management risk, inflation risk, global economic risk, growth risk, supply and demand risk, operations risk, regulatory risk, environmental risk, terrorism risk and the risk of natural disasters. The Underlying Stock performance may be affected by trends in commerce, and cloud computing, changes in the economic conditions in China and globally, international trade policies, the company’s investment transactions and changes in governmental regulations. The Fund’s daily returns may be affected by many factors but will depend on the performance and volatility of the Underlying Stock.
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| KraneShares 2x Long BABA Daily ETF | Indirect Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Indirect Investment Risk. The issuer is not affiliated with the Trust, the Adviser or any affiliates thereof and is not involved with this offering in any way, and has no obligation to consider the Fund in taking any corporate actions that might affect the value of the Fund. The Trust, the Fund and any affiliate are not responsible for the performance of the issuer and make no representation as to the performance of the issuer. Investing in the Fund is not equivalent to investing in the issuer. Fund shareholders will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to the issuer.
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| KraneShares 2x Long BABA Daily ETF | Effects Of Compounding And Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Effects of Compounding and Market Volatility Risk. The Fund seeks daily investment results, before fees and expenses, of two times (200%) the daily percentage change of the Underlying Stock and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from the Underlying Stock’s performance, before fees and expenses. The impact of compounding becomes more pronounced as volatility and holding periods increase and will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the issuer during the shareholder’s holding period. For a fund aiming to replicate two times the daily performance of an Underlying Stock, if adverse daily performance of the Underlying Stock reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if the favorable daily performance of the Underlying Stock increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The chart below provides examples of how Underlying Stock volatility could affect the Fund’s performance. Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) Underlying Stock volatility; b) Underlying Stock’s performance; c) period of time; d) financing rates associated with leveraged exposure; e) other Fund expenses; and f) the Underlying Stock’s dividends. The chart below illustrates the impact of two principal factors – Underlying Stock volatility and performance – on Fund performance. The chart shows estimated Fund returns for a number of combinations of Underlying Stock volatility and performance over a one-year period. Performance shown in the chart assumes that (i) there were no Fund expenses; and (ii) borrowing rates (needed to obtain a leveraged long exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected, the estimated returns would be lower than those shown. Particularly during periods of higher Underlying Stock volatility, compounding will cause results for periods longer than a trading day to vary from the performance of the Underlying Stock. As shown in the chart, the Fund would be expected to lose 6.1% if the Underlying Stock provided no return over a one-year period during which the Underlying Stock experienced annualized volatility of 25%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if the Underlying Stock return is flat.
For instance, if the Underlying Stock annualized volatility is 100%, the Fund would be expected to lose 63.3% of its value, even if the cumulative Underlying Stock return for the year was 0%. Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than 200% of the performance of the Underlying Stock and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than 200% of the performance of the Underlying Stock. The Fund’s actual returns may be significantly better or worse than the returns shown below as a result of any of the factors discussed above or in “Tracking Error Risk” below.
The Underlying Stock’s annualized historical volatility rate for the five-year period ended May 31, 2026, was 50.9%. During this five-year period, the Underlying Stock’s highest volatility rate over a 12-month period was 69.1% and volatility for a shorter period of time may have been substantially higher. The Underlying Stock’s annualized performance for the five-year period ended May 31, 2026, was -9.9%. Historical volatility and performance are not indications of what the Underlying Stock volatility and performance will be in the future. The volatility of instruments that reflect the value of the Underlying Stock, such as swaps, may differ from the volatility of the Underlying Stock.
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| KraneShares 2x Long BABA Daily ETF | Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Correlation Risk. A number of factors may affect the Fund’s ability to achieve a high degree of correlation with Underlying Stock, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s NAV each day may differ, perhaps significantly in amount, and possibly even direction, from 200% of the percentage change of Underlying Stock on such day.
In order to achieve a high degree of correlation with Underlying Stock, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its investment objective. Being materially under- or overexposed to Underlying Stock may prevent the Fund from achieving a high degree of correlation with Underlying Stock and may expose the Fund to greater leverage risk. Market disruptions or closure, regulatory restrictions, market volatility, illiquidity in the markets for the financial instruments in which the Fund invests, and other factors will adversely affect the Fund’s ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by Underlying Stock’s movements, including intraday movements. Because of this, it is unlikely that the Fund will have perfect 200% exposure during the day or at the end of each day and the likelihood of being materially under- or overexposed is higher on days when Underlying Stock is volatile, particularly when Underlying Stock is volatile at or near the close of the trading day.
A number of other factors may also adversely affect the Fund’s correlation with Underlying Stock, including fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with Underlying Stock. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being under- or overexposed to Underlying Stock. Additionally, the Fund’s underlying investments and/or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the performance of Underlying Stock. Any of these factors could decrease correlation between the performance of the Fund and Underlying Stock and may hinder the Fund’s ability to meet its daily investment objective on or around that day.
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| KraneShares 2x Long BABA Daily ETF | Intraday Investment Risk. [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Intraday Investment Risk. The intra-day performance of Fund shares traded in the secondary market will be different from the performance of the Fund when measured from the close of the market on a given trading day until the close of the market on the subsequent trading day. An investor that purchases shares intra-day may experience performance that is greater than, or less than, the Fund’s stated investment objective.
If there is a significant intra-day market event and/or the securities experience a significant change in value, the Fund may not meet its investment objective or may be unable to rebalance its portfolio appropriately, resulting in significant losses or reduced gains. In response to significant intraday market volatility, among other actions, the Adviser may determine to trade a portion or all of the rebalance trade or the Fund prior to market close, which may result in the Fund not achieving its investment objective. Additionally, the Fund’s Shares traded on the secondary market may experience significant premiums or discounts, or widened bid-ask spreads.
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| KraneShares 2x Long BABA Daily ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Underlying Stock will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the Underlying Stock, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the Underlying Stock declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Underlying Stock.
Due to the limited availability of necessary investments or financial instruments, the Fund could, among other things, as a defensive measure, limit or suspend creations or redemptions of Creation Units until the adviser determines that the requisite exposure to the Underlying Stock is obtainable. During the period that creation or redemptions are affected, the Fund’s shares could trade at a significant premium or discount to their net asset value or the bid-ask spread of the Fund’s shares could widen significantly. In the case of a period during which creations are suspended, the Fund could experience significant redemptions, which may cause the Fund to sell portfolio securities at unfavorable prices and increased transaction and other costs and make greater taxable distributions to shareholders of the Fund.
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| KraneShares 2x Long BABA Daily ETF | Swap Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Swap Risk. Swap agreements are entered into primarily with major global financial institutions for a specified period which may range from one day to more than one year. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities representing a particular index. Total return swaps are subject to counterparty risk, which relates to credit risk of the counterparty and liquidity risk of the swaps themselves. The primary risks associated with the use of swaps are mispricing or improper valuation, imperfect correlation between movements of the notional value of a swap and the price of the reference asset, and the failure of a counterparty to perform. If a swap counterparty’s creditworthiness for an “over-the-counter” swap declines, the value of the swap would also likely decline. There is no guarantee that the Fund could eliminate its exposure under an outstanding swap by entering into offsetting swap with the same or another party. The number of counterparties available to enter into swaps with the Fund is limited. The risk of loss with respect to swaps generally is limited to the net amount of payments that the Fund is contractually obligated to make or, in the case of the other party to a swap defaulting, the net amount of payments that the Fund is contractually entitled to receive.
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| KraneShares 2x Long BABA Daily ETF | Trading Halt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Trading Halt Risk. Although the Underlying Stock’s shares are listed for trading on an exchange, there can be no assurance that an active trading market for such shares will be available at all times and the exchange may halt trading of such shares in certain circumstances. A halt in trading in the Underlying Stock’s shares is expected, in turn, to result in a halt in the trading in the Fund’s shares. Trading in the Underlying Stock’s and/or Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Underling Stock’s and/or Fund’s shares inadvisable. In addition, trading in Underlying Stock’s and/or Fund’s shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. In the event of a trading halt for an extended period of time, the Fund may be unable to execute arrangements with swap counterparties that are necessary to implement the Fund’s investment strategy.
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| KraneShares 2x Long BABA Daily ETF | On Line Business Services And Retail Company Risks [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | On-Line Business Services and Retail Company Risks. The performance of the Underlying Stock, and consequently the Fund’s performance, is subject to the risks of the online retail company sector. Companies that operate in the online marketplace and retail segments are subject to fluctuating consumer demand. Unlike traditional brick and mortar retailers, online marketplaces and retailers must assume shipping costs or pass such costs to consumers. Consumer access to price information for the same or similar products may cause companies that operate in the online marketplace and retail segments to reduce profit margins in order to compete. Due to the nature of their business models, companies that operate in the online marketplace and retail segments may also be subject to heightened cyber security risk, including the risk of theft or damage to vital hardware, software and information systems.
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| KraneShares 2x Long BABA Daily ETF | E Commerce Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | E-Commerce Risk. The performance of the Underlying Stock, and consequently the Fund’s performance, is subject to e-commerce risk. E-commerce companies are subject to various risks that may cause significant losses, including risks related to warehousing and logistics capacity and deficiency issues, online security, system reliability, privacy failures, customer disputes, payment fraud, and website traffic decreases. Laws generally vary by country, including the application of taxes, which may create challenges for some e-commerce companies seeking to achieve scale. Companies in the e-commerce sector are especially subject to the adverse effects of economic recession and competition from new entrants in their fields of business.
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| KraneShares 2x Long BABA Daily ETF | Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares 2x Long BABA Daily ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Underlying Stock that is significantly greater or less than its stated multiple. As a result, the Fund may be more exposed to leverage risk than if it had been properly rebalanced and may not achieve its investment objective.
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| KraneShares 2x Long BABA Daily ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BABA Daily ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BABA Daily ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BIDU Daily ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares 2x Long BIDU Daily ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 2x Long BIDU Daily ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in the People’s Republic of China (“China” or the “PRC”) and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. Investments in Chinese securities, including those that are Hong Kong-listed and U.S.-listed securities, subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations and higher rates of inflation. China has experienced security concerns, such as terrorism and strained international relations. Incidents involving China’s or the region’s security may cause uncertainty in Chinese markets and may adversely affect the Chinese economy and the Fund’s investments.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. In addition, worsening trade relations between the two countries could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. This may also result in market volatility and volatility in the price of Fund shares.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers. Chinese companies with securities listed on U.S. exchanges may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements or due to worsening relations between the U.S. and China, which would significantly decrease the liquidity and value of the securities.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
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| KraneShares 2x Long BIDU Daily ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 2x Long BIDU Daily ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 2x Long BIDU Daily ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 2x Long BIDU Daily ETF | Communication Services Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Communication Services Sector Risk. The communication services sector may be dominated by a small number of companies which may lead to additional volatility in the sector. Communication services companies are particularly vulnerable to the potential obsolescence of products and services due to technological advances and the innovation of competitors. Communication services companies may also be affected by other competitive pressures, such as pricing competition, as well as research and development costs, substantial capital requirements and government regulation. Fluctuating domestic and international demand, shifting demographics and often unpredictable changes in consumer demand can drastically affect a communication services company’s profitability. Telecommunication service providers are often required to obtain licenses or franchises in order to provide services in a given location. Licensing or franchise rights are limited, which may result in an advantage to certain participants. Compliance with governmental regulations, delays or failure to receive regulatory approvals, or the enactment of new regulatory requirements may negatively affect the business of telecommunication services companies. Companies in media and entertainment industries can be significantly affected by competition, particularly in formulating new products and services using new technologies, and the cyclicality of revenues and earnings. Certain companies in the communication services sector may be particular targets of network security breaches, hacking and potential theft of proprietary or consumer information or disruptions in services, which would have a material adverse effect on their businesses.
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| KraneShares 2x Long BIDU Daily ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 2x Long BIDU Daily ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund. Krane’s evaluations and assumptions regarding investments, markets, trends, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 2x Long BIDU Daily ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 2x Long BIDU Daily ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 2x Long BIDU Daily ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 2x Long BIDU Daily ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 2x Long BIDU Daily ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 2x Long BIDU Daily ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares 2x Long BIDU Daily ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active secondary market trading of the Fund’s shares could cause more frequent creation and redemption activities, which would increase the number of portfolio transactions. High levels of portfolio transactions may cause higher transaction costs because of increased broker commissions resulting from such transactions and increased taxable capital gains. The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise most of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| KraneShares 2x Long BIDU Daily ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares 2x Long BIDU Daily ETF | Artificial Intelligence Technology Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Artificial Intelligence Technology Risk. Companies in the artificial intelligence (“AI”) and technology industries typically have high research and capital expenditures and, as a result, their profitability can vary widely, if they are profitable at all. The space in which they are engaged is highly competitive and issuers’ products and services may become obsolete very quickly. These companies are heavily dependent on intellectual property rights and may be adversely affected by loss or impairment of those rights. The issuers are also subject to legal, regulatory and political changes that may have a large impact on their profitability. A failure in an issuer’s product or even questions about the safety of the product could be devastating to the issuer, especially if it is the marquee product of the issuer. It can be difficult to accurately capture what qualifies as an AI and Technology company.
Certain AI and Technology companies may face special risks that their products or services may not prove to be commercially successful. Such companies are also strongly affected by worldwide scientific or technological developments. As a result, their products may rapidly become obsolete. Such companies are also often subject to governmental regulation and may, therefore, be adversely affected by governmental policies. In addition, certain of such companies in which the Fund may invest may not currently be profitable and there can be no assurance that such companies will be profitable in the future.
The economy may be significantly impacted by the advanced development and increased regulation of artificial intelligence technologies. As artificial intelligence technologies are used more widely, the profitability and growth of the Fund’s holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which artificial intelligence technologies operate continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.
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| KraneShares 2x Long BIDU Daily ETF | Indirect Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Indirect Investment Risk. The issuer is not affiliated with the Trust, the Adviser or any affiliates thereof and is not involved with this offering in any way, and has no obligation to consider the Fund in taking any corporate actions that might affect the value of the Fund. The Trust, the Fund and any affiliate are not responsible for the performance of the issuer and make no representation as to the performance of the issuer. Investing in the Fund is not equivalent to investing in the issuer. Fund shareholders will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to the issuer.
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| KraneShares 2x Long BIDU Daily ETF | Effects Of Compounding And Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Effects of Compounding and Market Volatility Risk. The Fund seeks daily investment results, before fees and expenses, of two times (200%) the daily percentage change of the Underlying Stock and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from the Underlying Stock’s performance, before fees and expenses. The impact of compounding becomes more pronounced as volatility and holding periods increase and will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the issuer during the shareholder’s holding period. For a fund aiming to replicate two times the daily performance of an Underlying Stock, if adverse daily performance of the Underlying Stock reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if the favorable daily performance of the Underlying Stock increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The chart below provides examples of how Underlying Stock volatility could affect the Fund’s performance. Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) Underlying Stock volatility; b) Underlying Stock’s performance; c) period of time; d) financing rates associated with leveraged exposure; e) other Fund expenses; and f) the Underlying Stock’s dividends. The chart below illustrates the impact of two principal factors – Underlying Stock volatility and performance – on Fund performance. The chart shows estimated Fund returns for a number of combinations of Underlying Stock volatility and performance over a one-year period. Performance shown in the chart assumes that (i) there were no Fund expenses; and (ii) borrowing rates (needed to obtain a leveraged long exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected, the estimated returns would be lower than those shown. Particularly during periods of higher Underlying Stock volatility, compounding will cause results for periods longer than a trading day to vary from the performance of the Underlying Stock. As shown in the chart, the Fund would be expected to lose 6.1% if the Underlying Stock provided no return over a one-year period during which the Underlying Stock experienced annualized volatility of 25%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if the Underlying Stock return is flat.
For instance, if the Underlying Stock annualized volatility is 100%, the Fund would be expected to lose 63.3% of its value, even if the cumulative Underlying Stock return for the year was 0%. Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than 200% of the performance of the Underlying Stock and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than 200% of the performance of the Underlying Stock. The Fund’s actual returns may be significantly better or worse than the returns shown below as a result of any of the factors discussed above or in “Tracking Error Risk” below.
The Underlying Stock’s annualized historical volatility rate for the five-year period ended May 31, 2026, was 51.3%. During this five-year period, the Underlying Stock’s highest volatility rate over a 12-month period was 70.5% and volatility for a shorter period of time may have been substantially higher. The Underlying Stock’s annualized performance for the five-year period ended May 31, 2026, was -9.0%. Historical volatility and performance are not indications of what the Underlying Stock volatility and performance will be in the future. The volatility of instruments that reflect the value of the Underlying Stock, such as swaps, may differ from the volatility of the Underlying Stock.
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| KraneShares 2x Long BIDU Daily ETF | Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Correlation Risk. A number of factors may affect the Fund’s ability to achieve a high degree of correlation with Underlying Stock, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s NAV each day may differ, perhaps significantly in amount, and possibly even direction, from 200% of the percentage change of Underlying Stock on such day.
In order to achieve a high degree of correlation with Underlying Stock, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its investment objective. Being materially under- or overexposed to Underlying Stock may prevent the Fund from achieving a high degree of correlation with Underlying Stock and may expose the Fund to greater leverage risk. Market disruptions or closure, regulatory restrictions, market volatility, illiquidity in the markets for the financial instruments in which the Fund invests, and other factors will adversely affect the Fund’s ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by Underlying Stock’s movements, including intraday movements. Because of this, it is unlikely that the Fund will have perfect 200% exposure during the day or at the end of each day and the likelihood of being materially under- or overexposed is higher on days when Underlying Stock is volatile, particularly when Underlying Stock is volatile at or near the close of the trading day.
A number of other factors may also adversely affect the Fund’s correlation with Underlying Stock, including fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with Underlying Stock. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being under- or overexposed to Underlying Stock. Additionally, the Fund’s underlying investments and/or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the performance of Underlying Stock. Any of these factors could decrease correlation between the performance of the Fund and Underlying Stock and may hinder the Fund’s ability to meet its daily investment objective on or around that day.
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| KraneShares 2x Long BIDU Daily ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Underlying Stock will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the Underlying Stock, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the Underlying Stock declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Underlying Stock.
Due to the limited availability of necessary investments or financial instruments, the Fund could, among other things, as a defensive measure, limit or suspend creations or redemptions of Creation Units until the adviser determines that the requisite exposure to the Underlying Stock is obtainable. During the period that creation or redemptions are affected, the Fund’s shares could trade at a significant premium or discount to their net asset value or the bid-ask spread of the Fund’s shares could widen significantly. In the case of a period during which creations are suspended, the Fund could experience significant redemptions, which may cause the Fund to sell portfolio securities at unfavorable prices and increased transaction and other costs and make greater taxable distributions to shareholders of the Fund.
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| KraneShares 2x Long BIDU Daily ETF | Swap Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Swap Risk. Swap agreements are entered into primarily with major global financial institutions for a specified period which may range from one day to more than one year. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities representing a particular index. Total return swaps are subject to counterparty risk, which relates to credit risk of the counterparty and liquidity risk of the swaps themselves. The primary risks associated with the use of swaps are mispricing or improper valuation, imperfect correlation between movements of the notional value of a swap and the price of the reference asset, and the failure of a counterparty to perform. If a swap counterparty’s creditworthiness for an “over-the-counter” swap declines, the value of the swap would also likely decline. There is no guarantee that the Fund could eliminate its exposure under an outstanding swap by entering into offsetting swap with the same or another party. The number of counterparties available to enter into swaps with the Fund is limited. The risk of loss with respect to swaps generally is limited to the net amount of payments that the Fund is contractually obligated to make or, in the case of the other party to a swap defaulting, the net amount of payments that the Fund is contractually entitled to receive.
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| KraneShares 2x Long BIDU Daily ETF | Trading Halt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Trading Halt Risk. Although the Underlying Stock’s shares are listed for trading on an exchange, there can be no assurance that an active trading market for such shares will be available at all times and the exchange may halt trading of such shares in certain circumstances. A halt in trading in the Underlying Stock’s shares is expected, in turn, to result in a halt in the trading in the Fund’s shares. Trading in the Underlying Stock’s and/or Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Underling Stock’s and/or Fund’s shares inadvisable. In addition, trading in Underlying Stock’s and/or Fund’s shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. In the event of a trading halt for an extended period of time, the Fund may be unable to execute arrangements with swap counterparties that are necessary to implement the Fund’s investment strategy.
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| KraneShares 2x Long BIDU Daily ETF | Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares 2x Long BIDU Daily ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Underlying Stock that is significantly greater or less than its stated multiple. As a result, the Fund may be more exposed to leverage risk than if it had been properly rebalanced and may not achieve its investment objective.
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| KraneShares 2x Long BIDU Daily ETF | Baidu Inc Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Baidu Inc. Investing Risk. Issuer-specific attributes may cause an investment held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. As of the date of this prospectus, in addition to the risks associated with companies in the communication sector, BIDU faces risks associated with: the highly competitive nature of the e-commerce industry; economic and market uncertainty; reductions in demand for its products; potential concentration of revenues in a few large clients; geopolitical events and pandemics; adequate protection of technology or other intellectual property; exchange rates; reliance on third parties to manufacture products; possible shortages of equipment or materials needed to manufacture products; cybersecurity attacks and data breaches; system failures or outages; potential incompatibility of product with some or all industry standard software and hardware; increases in costs; adverse government regulations; regulatory compliance costs; litigation; taxes; indebtedness; and the ability to attract and retain high quality talent.
The Underlying Stock is subject to many risks that can negatively impact its revenue and viability including, but are not limited to price volatility risk, management risk, inflation risk, global economic risk, growth risk, supply and demand risk, operations risk, regulatory risk, environmental risk, terrorism risk and the risk of natural disasters. The Underlying Stock performance may be affected by trends in commerce, and cloud computing, changes in the economic conditions in China and globally, international trade policies, the company’s investment transactions and changes in governmental regulations. The Fund’s daily returns may be affected by many factors but will depend on the performance and volatility of the Underlying Stock.
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| KraneShares 2x Long BIDU Daily ETF | Intraday Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Intraday Investment Risk. The intra-day performance of Fund shares traded in the secondary market will be different from the performance of the Fund when measured from the close of the market on a given trading day until the close of the market on the subsequent trading day. An investor that purchases shares intra-day may experience performance that is greater than, or less than, the Fund’s stated investment objective.
If there is a significant intra-day market event and/or the securities experience a significant change in value, the Fund may not meet its investment objective or may be unable to rebalance its portfolio appropriately, resulting in significant losses or reduced gains. In response to significant intraday market volatility, among other actions, the Adviser may determine to trade a portion or all of the rebalance trade or the Fund prior to market close, which may result in the Fund not achieving its investment objective. Additionally, the Fund’s Shares traded on the secondary market may experience significant premiums or discounts, or widened bid-ask spreads.
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| KraneShares 2x Long BIDU Daily ETF | Media And Entertainment Industry Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Media and Entertainment Industry Risk. Media, entertainment and related industries can be significantly affected by several factors, including competition, particularly in formulation of products and services using new technologies, high costs of production, research and development for new content, products and services, rapid obsolescence of products, cyclicality of revenues and earnings, a potential decrease in the discretionary income of targeted individuals, changing consumer tastes, preferences and discretionary income patterns, legislative or regulatory changes and a potential increase in government regulation.
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| KraneShares 2x Long BIDU Daily ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BIDU Daily ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long BIDU Daily ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long JD Daily ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares 2x Long JD Daily ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 2x Long JD Daily ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in the People’s Republic of China (“China” or the “PRC”) and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. Investments in Chinese securities, including those that are Hong Kong-listed and U.S.-listed securities, subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations and higher rates of inflation. China has experienced security concerns, such as terrorism and strained international relations. Incidents involving China’s or the region’s security may cause uncertainty in Chinese markets and may adversely affect the Chinese economy and the Fund’s investments.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. In addition, worsening trade relations between the two countries could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. This may also result in market volatility and volatility in the price of Fund shares.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers. Chinese companies with securities listed on U.S. exchanges may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements or due to worsening relations between the U.S. and China, which would significantly decrease the liquidity and value of the securities.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
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| KraneShares 2x Long JD Daily ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 2x Long JD Daily ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 2x Long JD Daily ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 2x Long JD Daily ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 2x Long JD Daily ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 2x Long JD Daily ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund. Krane’s evaluations and assumptions regarding investments, markets, trends, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 2x Long JD Daily ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 2x Long JD Daily ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 2x Long JD Daily ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 2x Long JD Daily ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 2x Long JD Daily ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 2x Long JD Daily ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares 2x Long JD Daily ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active secondary market trading of the Fund’s shares could cause more frequent creation and redemption activities, which would increase the number of portfolio transactions. High levels of portfolio transactions may cause higher transaction costs because of increased broker commissions resulting from such transactions and increased taxable capital gains. The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise most of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| KraneShares 2x Long JD Daily ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares 2x Long JD Daily ETF | Indirect Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Indirect Investment Risk. The issuer is not affiliated with the Trust, the Adviser or any affiliates thereof and is not involved with this offering in any way, and has no obligation to consider the Fund in taking any corporate actions that might affect the value of the Fund. The Trust, the Fund and any affiliate are not responsible for the performance of the issuer and make no representation as to the performance of the issuer. Investing in the Fund is not equivalent to investing in the issuer. Fund shareholders will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to the issuer.
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| KraneShares 2x Long JD Daily ETF | Effects Of Compounding And Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Effects of Compounding and Market Volatility Risk. The Fund seeks daily investment results, before fees and expenses, of two times (200%) the daily percentage change of the Underlying Stock and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from the Underlying Stock’s performance, before fees and expenses. The impact of compounding becomes more pronounced as volatility and holding periods increase and will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the issuer during the shareholder’s holding period. For a fund aiming to replicate two times the daily performance of an Underlying Stock, if adverse daily performance of the Underlying Stock reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if the favorable daily performance of the Underlying Stock increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The chart below provides examples of how Underlying Stock volatility could affect the Fund’s performance. Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) Underlying Stock volatility; b) Underlying Stock’s performance; c) period of time; d) financing rates associated with leveraged exposure; e) other Fund expenses; and f) the Underlying Stock’s dividends. The chart below illustrates the impact of two principal factors – Underlying Stock volatility and performance – on Fund performance. The chart shows estimated Fund returns for a number of combinations of Underlying Stock volatility and performance over a one-year period. Performance shown in the chart assumes that (i) there were no Fund expenses; and (ii) borrowing rates (needed to obtain a leveraged long exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected, the estimated returns would be lower than those shown. Particularly during periods of higher Underlying Stock volatility, compounding will cause results for periods longer than a trading day to vary from the performance of the Underlying Stock. As shown in the chart, the Fund would be expected to lose 6.1% if the Underlying Stock provided no return over a one-year period during which the Underlying Stock experienced annualized volatility of 25%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if the Underlying Stock return is flat.
For instance, if the Underlying Stock annualized volatility is 100%, the Fund would be expected to lose 63.3% of its value, even if the cumulative Underlying Stock return for the year was 0%. Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than 200% of the performance of the Underlying Stock and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than 200% of the performance of the Underlying Stock. The Fund’s actual returns may be significantly better or worse than the returns shown below as a result of any of the factors discussed above or in “Tracking Error Risk” below.
The Underlying Stock’s annualized historical volatility rate for the five-year period ended May 31, 2026, was 53.3%. During this five-year period, the Underlying Stock’s highest volatility rate over a 12-month period was 58.4% and volatility for a shorter period of time may have been substantially higher. The Underlying Stock’s annualized performance for the five-year period ended May 31, 2026, was -16.7%. Historical volatility and performance are not indications of what the Underlying Stock volatility and performance will be in the future. The volatility of instruments that reflect the value of the Underlying Stock, such as swaps, may differ from the volatility of the Underlying Stock.
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| KraneShares 2x Long JD Daily ETF | Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Correlation Risk. A number of factors may affect the Fund’s ability to achieve a high degree of correlation with Underlying Stock, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s NAV each day may differ, perhaps significantly in amount, and possibly even direction, from 200% of the percentage change of Underlying Stock on such day.
In order to achieve a high degree of correlation with Underlying Stock, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its investment objective. Being materially under- or overexposed to Underlying Stock may prevent the Fund from achieving a high degree of correlation with Underlying Stock and may expose the Fund to greater leverage risk. Market disruptions or closure, regulatory restrictions, market volatility, illiquidity in the markets for the financial instruments in which the Fund invests, and other factors will adversely affect the Fund’s ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by Underlying Stock’s movements, including intraday movements. Because of this, it is unlikely that the Fund will have perfect 200% exposure during the day or at the end of each day and the likelihood of being materially under- or overexposed is higher on days when Underlying Stock is volatile, particularly when Underlying Stock is volatile at or near the close of the trading day.
A number of other factors may also adversely affect the Fund’s correlation with Underlying Stock, including fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with Underlying Stock. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being under- or overexposed to Underlying Stock. Additionally, the Fund’s underlying investments and/or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the performance of Underlying Stock. Any of these factors could decrease correlation between the performance of the Fund and Underlying Stock and may hinder the Fund’s ability to meet its daily investment objective on or around that day.
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| KraneShares 2x Long JD Daily ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Underlying Stock will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the Underlying Stock, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the Underlying Stock declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Underlying Stock.
Due to the limited availability of necessary investments or financial instruments, the Fund could, among other things, as a defensive measure, limit or suspend creations or redemptions of Creation Units until the adviser determines that the requisite exposure to the Underlying Stock is obtainable. During the period that creation or redemptions are affected, the Fund’s shares could trade at a significant premium or discount to their net asset value or the bid-ask spread of the Fund’s shares could widen significantly. In the case of a period during which creations are suspended, the Fund could experience significant redemptions, which may cause the Fund to sell portfolio securities at unfavorable prices and increased transaction and other costs and make greater taxable distributions to shareholders of the Fund.
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| KraneShares 2x Long JD Daily ETF | Swap Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Swap Risk. Swap agreements are entered into primarily with major global financial institutions for a specified period which may range from one day to more than one year. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities representing a particular index. Total return swaps are subject to counterparty risk, which relates to credit risk of the counterparty and liquidity risk of the swaps themselves. The primary risks associated with the use of swaps are mispricing or improper valuation, imperfect correlation between movements of the notional value of a swap and the price of the reference asset, and the failure of a counterparty to perform. If a swap counterparty’s creditworthiness for an “over-the-counter” swap declines, the value of the swap would also likely decline. There is no guarantee that the Fund could eliminate its exposure under an outstanding swap by entering into offsetting swap with the same or another party. The number of counterparties available to enter into swaps with the Fund is limited. The risk of loss with respect to swaps generally is limited to the net amount of payments that the Fund is contractually obligated to make or, in the case of the other party to a swap defaulting, the net amount of payments that the Fund is contractually entitled to receive.
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| KraneShares 2x Long JD Daily ETF | Trading Halt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Trading Halt Risk. Although the Underlying Stock’s shares are listed for trading on an exchange, there can be no assurance that an active trading market for such shares will be available at all times and the exchange may halt trading of such shares in certain circumstances. A halt in trading in the Underlying Stock’s shares is expected, in turn, to result in a halt in the trading in the Fund’s shares. Trading in the Underlying Stock’s and/or Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Underling Stock’s and/or Fund’s shares inadvisable. In addition, trading in Underlying Stock’s and/or Fund’s shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. In the event of a trading halt for an extended period of time, the Fund may be unable to execute arrangements with swap counterparties that are necessary to implement the Fund’s investment strategy.
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| KraneShares 2x Long JD Daily ETF | E Commerce Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | E-Commerce Risk. The performance of the Underlying Stock, and consequently the Fund’s performance, is subject to e-commerce risk. E-commerce companies are subject to various risks that may cause significant losses, including risks related to warehousing and logistics capacity and deficiency issues, online security, system reliability, privacy failures, customer disputes, payment fraud, and website traffic decreases. Laws generally vary by country, including the application of taxes, which may create challenges for some e-commerce companies seeking to achieve scale. Companies in the e-commerce sector are especially subject to the adverse effects of economic recession and competition from new entrants in their fields of business.
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| KraneShares 2x Long JD Daily ETF | Small Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Small Fund Risk. The Fund is small and does not yet have a significant number of shares outstanding or significant assets under management and, therefore, even small trading or similar errors, if experienced, may have a significant impact on NAV. Small funds are at greater risk than larger funds of wider bid-ask spreads for its shares, trading at a greater premium or discount to NAV, liquidation and/or a stop to trading.
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| KraneShares 2x Long JD Daily ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Underlying Stock that is significantly greater or less than its stated multiple. As a result, the Fund may be more exposed to leverage risk than if it had been properly rebalanced and may not achieve its investment objective.
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| KraneShares 2x Long JD Daily ETF | Intraday Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Intraday Investment Risk. The intra-day performance of Fund shares traded in the secondary market will be different from the performance of the Fund when measured from the close of the market on a given trading day until the close of the market on the subsequent trading day. An investor that purchases shares intra-day may experience performance that is greater than, or less than, the Fund’s stated investment objective.
If there is a significant intra-day market event and/or the securities experience a significant change in value, the Fund may not meet its investment objective or may be unable to rebalance its portfolio appropriately, resulting in significant losses or reduced gains. In response to significant intraday market volatility, among other actions, the Adviser may determine to trade a portion or all of the rebalance trade or the Fund prior to market close, which may result in the Fund not achieving its investment objective. Additionally, the Fund’s Shares traded on the secondary market may experience significant premiums or discounts, or widened bid-ask spreads.
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| KraneShares 2x Long JD Daily ETF | J D Com Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | JD.com, Inc. Investing Risk. Issuer-specific attributes may cause an investment held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. As of the date of this prospectus, in addition to the risks associated with companies in the technology sector, JD faces risks associated with: the highly competitive nature of the e-commerce industry; economic and market uncertainty; reductions in demand for its products; potential concentration of revenues in a few large clients; geopolitical events and pandemics; adequate protection of technology or other intellectual property; exchange rates; reliance on third parties to manufacture products; possible shortages of equipment or materials needed to manufacture products; cybersecurity attacks and data breaches; system failures or outages; potential incompatibility of product with some or all industry standard software and hardware; increases in costs; adverse government regulations; regulatory compliance costs; litigation; taxes; indebtedness; and the ability to attract and retain high quality talent.
The Underlying Stock is subject to many risks that can negatively impact its revenue and viability including, but are not limited to price volatility risk, management risk, inflation risk, global economic risk, growth risk, supply and demand risk, operations risk, regulatory risk, environmental risk, terrorism risk and the risk of natural disasters. The Underlying Stock performance may be affected by trends in commerce, and cloud computing, changes in the economic conditions in China and globally, international trade policies, the company’s investment transactions and changes in governmental regulations. The Fund’s daily returns may be affected by many factors but will depend on the performance and volatility of the Underlying Stock.
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| KraneShares 2x Long JD Daily ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long JD Daily ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long JD Daily ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long MELI Daily ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares 2x Long MELI Daily ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 2x Long MELI Daily ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in the People’s Republic of China (“China” or the “PRC”) and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. Investments in Chinese securities, including those that are Hong Kong-listed and U.S.-listed securities, subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized.
Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations and higher rates of inflation. China has experienced security concerns, such as terrorism and strained international relations. Incidents involving China’s or the region’s security may cause uncertainty in Chinese markets and may adversely affect the Chinese economy and the Fund’s investments.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. In addition, worsening trade relations between the two countries could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. This may also result in market volatility and volatility in the price of Fund shares.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers. Chinese companies with securities listed on U.S. exchanges may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements or due to worsening relations between the U.S. and China, which would significantly decrease the liquidity and value of the securities.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
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| KraneShares 2x Long MELI Daily ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 2x Long MELI Daily ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 2x Long MELI Daily ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 2x Long MELI Daily ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 2x Long MELI Daily ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 2x Long MELI Daily ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund. Krane’s evaluations and assumptions regarding investments, markets, trends, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 2x Long MELI Daily ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 2x Long MELI Daily ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 2x Long MELI Daily ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 2x Long MELI Daily ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 2x Long MELI Daily ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 2x Long MELI Daily ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares 2x Long MELI Daily ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active secondary market trading of the Fund’s shares could cause more frequent creation and redemption activities, which would increase the number of portfolio transactions. High levels of portfolio transactions may cause higher transaction costs because of increased broker commissions resulting from such transactions and increased taxable capital gains. The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise most of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| KraneShares 2x Long MELI Daily ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares 2x Long MELI Daily ETF | Indirect Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Indirect Investment Risk. The issuer is not affiliated with the Trust, the Adviser or any affiliates thereof and is not involved with this offering in any way, and has no obligation to consider the Fund in taking any corporate actions that might affect the value of the Fund. The Trust, the Fund and any affiliate are not responsible for the performance of the issuer and make no representation as to the performance of the issuer. Investing in the Fund is not equivalent to investing in the issuer. Fund shareholders will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to the issuer.
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| KraneShares 2x Long MELI Daily ETF | Effects Of Compounding And Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Effects of Compounding and Market Volatility Risk. The Fund seeks daily investment results, before fees and expenses, of two times (200%) the daily percentage change of the Underlying Stock and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from the Underlying Stock’s performance, before fees and expenses. The impact of compounding becomes more pronounced as volatility and holding periods increase and will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the issuer during the shareholder’s holding period. For a fund aiming to replicate two times the daily performance of an Underlying Stock, if adverse daily performance of the Underlying Stock reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if the favorable daily performance of the Underlying Stock increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The chart below provides examples of how Underlying Stock volatility could affect the Fund’s performance. Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) Underlying Stock volatility; b) Underlying Stock’s performance; c) period of time; d) financing rates associated with leveraged exposure; e) other Fund expenses; and f) the Underlying Stock’s dividends. The chart below illustrates the impact of two principal factors – Underlying Stock volatility and performance – on Fund performance. The chart shows estimated Fund returns for a number of combinations of Underlying Stock volatility and performance over a one-year period. Performance shown in the chart assumes that (i) there were no Fund expenses; and (ii) borrowing rates (needed to obtain a leveraged long exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected, the estimated returns would be lower than those shown. Particularly during periods of higher Underlying Stock volatility, compounding will cause results for periods longer than a trading day to vary from the performance of the Underlying Stock. As shown in the chart, the Fund would be expected to lose 6.1% if the Underlying Stock provided no return over a one-year period during which the Underlying Stock experienced annualized volatility of 25%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if the Underlying Stock return is flat.
For instance, if the Underlying Stock annualized volatility is 100%, the Fund would be expected to lose 63.3% of its value, even if the cumulative Underlying Stock return for the year was 0%. Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than 200% of the performance of the Underlying Stock and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than 200% of the performance of the Underlying Stock. The Fund’s actual returns may be significantly better or worse than the returns shown below as a result of any of the factors discussed above or in “Tracking Error Risk” below.
The Underlying Stock’s annualized historical volatility rate for the five-year period ended May 31, 2026, was 49.3%. During this five-year period, the Underlying Stock’s highest volatility rate over a 12-month period was 56.0% and volatility for a shorter period of time may have been substantially higher. The Underlying Stock’s annualized performance for the five-year period ended May 31, 2026, was 2.3%. Historical volatility and performance are not indications of what the Underlying Stock volatility and performance will be in the future. The volatility of instruments that reflect the value of the Underlying Stock, such as swaps, may differ from the volatility of the Underlying Stock.
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| KraneShares 2x Long MELI Daily ETF | Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Correlation Risk. A number of factors may affect the Fund’s ability to achieve a high degree of correlation with Underlying Stock, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s NAV each day may differ, perhaps significantly in amount, and possibly even direction, from 200% of the percentage change of Underlying Stock on such day.
In order to achieve a high degree of correlation with Underlying Stock, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its investment objective. Being materially under- or overexposed to Underlying Stock may prevent the Fund from achieving a high degree of correlation with Underlying Stock and may expose the Fund to greater leverage risk. Market disruptions or closure, regulatory restrictions, market volatility, illiquidity in the markets for the financial instruments in which the Fund invests, and other factors will adversely affect the Fund’s ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by Underlying Stock’s movements, including intraday movements. Because of this, it is unlikely that the Fund will have perfect 200% exposure during the day or at the end of each day and the likelihood of being materially under- or overexposed is higher on days when Underlying Stock is volatile, particularly when Underlying Stock is volatile at or near the close of the trading day.
A number of other factors may also adversely affect the Fund’s correlation with Underlying Stock, including fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with Underlying Stock. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being under- or overexposed to Underlying Stock. Additionally, the Fund’s underlying investments and/or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the performance of Underlying Stock. Any of these factors could decrease correlation between the performance of the Fund and Underlying Stock and may hinder the Fund’s ability to meet its daily investment objective on or around that day.
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| KraneShares 2x Long MELI Daily ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Underlying Stock will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the Underlying Stock, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the Underlying Stock declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Underlying Stock.
Due to the limited availability of necessary investments or financial instruments, the Fund could, among other things, as a defensive measure, limit or suspend creations or redemptions of Creation Units until the adviser determines that the requisite exposure to the Underlying Stock is obtainable. During the period that creation or redemptions are affected, the Fund’s shares could trade at a significant premium or discount to their net asset value or the bid-ask spread of the Fund’s shares could widen significantly. In the case of a period during which creations are suspended, the Fund could experience significant redemptions, which may cause the Fund to sell portfolio securities at unfavorable prices and increased transaction and other costs and make greater taxable distributions to shareholders of the Fund.
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| KraneShares 2x Long MELI Daily ETF | Swap Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Swap Risk. Swap agreements are entered into primarily with major global financial institutions for a specified period which may range from one day to more than one year. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities representing a particular index. Total return swaps are subject to counterparty risk, which relates to credit risk of the counterparty and liquidity risk of the swaps themselves. The primary risks associated with the use of swaps are mispricing or improper valuation, imperfect correlation between movements of the notional value of a swap and the price of the reference asset, and the failure of a counterparty to perform. If a swap counterparty’s creditworthiness for an “over-the-counter” swap declines, the value of the swap would also likely decline. There is no guarantee that the Fund could eliminate its exposure under an outstanding swap by entering into offsetting swap with the same or another party. The number of counterparties available to enter into swaps with the Fund is limited. The risk of loss with respect to swaps generally is limited to the net amount of payments that the Fund is contractually obligated to make or, in the case of the other party to a swap defaulting, the net amount of payments that the Fund is contractually entitled to receive.
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| KraneShares 2x Long MELI Daily ETF | Trading Halt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Trading Halt Risk. Although the Underlying Stock’s shares are listed for trading on an exchange, there can be no assurance that an active trading market for such shares will be available at all times and the exchange may halt trading of such shares in certain circumstances. A halt in trading in the Underlying Stock’s shares is expected, in turn, to result in a halt in the trading in the Fund’s shares. Trading in the Underlying Stock’s and/or Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Underling Stock’s and/or Fund’s shares inadvisable. In addition, trading in Underlying Stock’s and/or Fund’s shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. In the event of a trading halt for an extended period of time, the Fund may be unable to execute arrangements with swap counterparties that are necessary to implement the Fund’s investment strategy.
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| KraneShares 2x Long MELI Daily ETF | E Commerce Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | E-Commerce Risk. The performance of the Underlying Stock, and consequently the Fund’s performance, is subject to e-commerce risk. E-commerce companies are subject to various risks that may cause significant losses, including risks related to warehousing and logistics capacity and deficiency issues, online security, system reliability, privacy failures, customer disputes, payment fraud, and website traffic decreases. Laws generally vary by country, including the application of taxes, which may create challenges for some e-commerce companies seeking to achieve scale. Companies in the e-commerce sector are especially subject to the adverse effects of economic recession and competition from new entrants in their fields of business.
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| KraneShares 2x Long MELI Daily ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Underlying Stock that is significantly greater or less than its stated multiple. As a result, the Fund may be more exposed to leverage risk than if it had been properly rebalanced and may not achieve its investment objective.
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| KraneShares 2x Long MELI Daily ETF | Intraday Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Intraday Investment Risk. The intra-day performance of Fund shares traded in the secondary market will be different from the performance of the Fund when measured from the close of the market on a given trading day until the close of the market on the subsequent trading day. An investor that purchases shares intra-day may experience performance that is greater than, or less than, the Fund’s stated investment objective.
If there is a significant intra-day market event and/or the securities experience a significant change in value, the Fund may not meet its investment objective or may be unable to rebalance its portfolio appropriately, resulting in significant losses or reduced gains. In response to significant intraday market volatility, among other actions, the Adviser may determine to trade a portion or all of the rebalance trade or the Fund prior to market close, which may result in the Fund not achieving its investment objective. Additionally, the Fund’s Shares traded on the secondary market may experience significant premiums or discounts, or widened bid-ask spreads.
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| KraneShares 2x Long MELI Daily ETF | Mercadolibre Inc Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | MercadoLibre, Inc. Investing Risk. Issuer-specific attributes may cause an investment held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. As of the date of this prospectus, in addition to the risks associated with companies in the consumer discretionary sector, MELI faces risks associated with: the highly competitive nature of the e-commerce industry; economic and market uncertainty; reductions in demand for its products; potential concentration of revenues in a few large clients; geopolitical events and pandemics; adequate protection of technology or other intellectual property; exchange rates; reliance on third parties to manufacture products; possible shortages of equipment or materials needed to manufacture products; cybersecurity attacks and data breaches; system failures or outages; potential incompatibility of product with some or all industry standard software and hardware; increases in costs; adverse government regulations; regulatory compliance costs; litigation; taxes; indebtedness; and the ability to attract and retain high quality talent.
The Underlying Stock is subject to many risks that can negatively impact its revenue and viability including, but are not limited to price volatility risk, management risk, inflation risk, global economic risk, growth risk, supply and demand risk, operations risk, regulatory risk, environmental risk, terrorism risk and the risk of natural disasters. The Underlying Stock performance may be affected by trends in commerce, and cloud computing, changes in the economic conditions in China and globally, international trade policies, the company’s investment transactions and changes in governmental regulations. The Fund’s daily returns may be affected by many factors but will depend on the performance and volatility of the Underlying Stock.
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| KraneShares 2x Long MELI Daily ETF | Latin America Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Latin America Risk. Latin America has long suffered from political, economic, and social instability. This has meant additional risk caused by periods of regional conflict, political corruption, totalitarianism, protectionist measures, nationalization, hyperinflation, debt crises and defaults, sudden and large currency devaluation, and intervention by the military in civilian and economic spheres. While some Latin American governments have experienced privatization of state-owned companies and relaxation of trade restrictions, future free-market economic reforms are uncertain, and political unrest could result in significant disruption in securities markets in the region. The economies of certain Latin American countries have experienced high interest rates, economic volatility, inflation and high unemployment rates. Adverse economic events in one country may have a significant adverse effect on other Latin American countries.
Commodities (such as oil, gas and minerals) represent a significant percentage of the region’s exports and many economies in this region are particularly sensitive to fluctuations in commodity prices. Some markets are in areas that have historically been prone to natural disasters or are economically sensitive to environmental events, and a natural disaster could have a significant adverse impact on the economies in the geographic region.
Many Latin American countries have high levels of debt, which may stifle economic growth, contribute to prolonged periods of recession and adversely impact the Fund.
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| KraneShares 2x Long MELI Daily ETF | Brazil Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Brazil Risk. Investing in Brazilian issuers subjects the Fund to legal, regulatory, political, currency, security, and economic risks that are specific to Brazil. Agricultural and mining exports are important to the Brazilian economy, which thus is susceptible to fluctuations in the commodity markets. The Brazilian economy has experienced high inflation and high government debt levels, which could constrain economic growth. Brazil may face heightened risks of political instability, which could exacerbate structural economic risks.
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| KraneShares 2x Long MELI Daily ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long MELI Daily ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long MELI Daily ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long PDD Daily ETF | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | As with all ETFs, a shareholder of the Fund is subject to the risk that his or her investment could lose money. The Fund may not achieve its investment objective and an investment in the Fund is not by itself a complete or balanced investment program. An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. An investment in the Fund involves the risk of total loss. In addition to these risks, the Fund is subject to a number of additional principal risks that may affect the Fund’s performance, net asset value (“NAV”) and trading price, including:
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| KraneShares 2x Long PDD Daily ETF | Derivatives Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Derivatives Risk. The use of derivatives (including swaps, futures, forwards, structured notes and options) may involve leverage, which includes risks that are different from, and greater than, the risks associated with investing directly in a reference asset, because a small investment in a derivative can result in a large impact on the Fund and may cause the Fund to be more volatile. Derivatives may at times be highly illiquid, and the Fund may not be able to close out or sell a derivative at a particular time or at an anticipated price. Derivatives can be difficult to value and valuation may be more difficult in times of market turmoil. There may be imperfect correlation between the derivative and that of the reference asset, resulting in unexpected returns that could materially adversely affect the Fund. Certain derivatives (such as swaps and options) are bi-lateral agreements that expose the Fund to counterparty risk, which is the risk of loss in the event that the counterparty to an agreement fails to make required payments or otherwise comply with the terms of derivative. In that case, the Fund may suffer losses potentially equal to, or greater than, the full value of the derivative if the counterparty fails to perform its obligations. That risk is generally thought to be greater with over-the-counter (“OTC”) derivatives than with derivatives that are exchange traded or centrally cleared. Counterparty risks are compounded by the fact that there are only a limited number of ways available to invest in certain reference assets and, therefore, there may be few counterparties to swaps or options based on those reference assets.
Pursuant to government regulations, the Fund’s portfolio turnover rate is calculated without regard to most derivatives. As a result, the Fund’s portfolio turnover may be low despite relatively high portfolio activity. High portfolio turnover or high portfolio activity may increase the Fund’s brokerage commission costs and other transaction costs and may negatively impact the Fund’s performance. Such portfolio turnover or activity also may generate net short-term capital gains.
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| KraneShares 2x Long PDD Daily ETF | China Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | China Risk. The Chinese economy is generally considered an emerging market and can be significantly affected by economic and political conditions in the People’s Republic of China (“China” or the “PRC”) and surrounding Asian countries and may demonstrate significantly higher volatility from time to time in comparison to developed markets. Investments in Chinese securities, including those that are Hong Kong-listed and U.S.-listed securities, subject the Fund to risks specific to China. China may be subject to considerable degrees of economic, political and social instability. Over the last few decades, the Chinese government has undertaken reform of economic and market practices and has expanded the sphere of private ownership of property in China. However, Chinese markets generally continue to experience inefficiency, volatility and pricing anomalies resulting from governmental influence, a lack of publicly available information and/or political and social instability. Chinese companies are also subject to the risk that Chinese authorities can intervene in their operations and structure. In addition, the Chinese economy is export-driven and highly reliant on trading with key partners. A downturn in the economies of China’s primary trading partners could slow or eliminate the growth of the Chinese economy and adversely impact the Fund’s investments. The Chinese government strictly regulates the payment of foreign currency denominated obligations and sets monetary policy. The RMB is not freely convertible, but rather is subject to approval of PRC authorities. Although Chinese authorities have indicated an intent to move to a freely convertible RMB, there is no assurance that repatriation restrictions will not continue. The Chinese government may introduce new laws and regulations that could have an adverse effect on the Fund. Although China has begun the process of privatizing certain sectors of its economy, privatized entities may lose money and/or be re-nationalized. Internal social unrest or confrontations with other neighboring countries, including military conflicts in response to such events, may also disrupt economic development in China and result in a greater risk of currency fluctuations, currency convertibility, interest rate fluctuations and higher rates of inflation. China has experienced security concerns, such as terrorism and strained international relations. Incidents involving China’s or the region’s security may cause uncertainty in Chinese markets and may adversely affect the Chinese economy and the Fund’s investments.
In the Chinese securities markets, a small number of issuers may represent a large portion of the entire market. The Chinese securities markets are subject to more frequent trading halts, low trading volume and price volatility. Recent developments in relations between the United States and China have heightened concerns of increased tariffs and restrictions on trade between the two countries. An increase in tariffs or trade restrictions, or even the threat of such developments, could lead to a significant reduction in international trade, which could have a negative impact on China’s export industry and a commensurately negative impact on the Fund. In addition, worsening trade relations between the two countries could adversely impact the Fund, particularly to the extent that the Chinese government restricts foreign investments in on-shore Chinese companies or the U.S. government restricts investments by U.S. investors in China. This may also result in market volatility and volatility in the price of Fund shares.
In recent years, Chinese entities have incurred significant levels of debt and Chinese financial institutions currently hold relatively large amounts of non-performing debt. Thus, there exists a possibility that widespread defaults could occur, which could trigger a financial crisis, freeze Chinese debt and finance markets and make Chinese securities illiquid.
Disclosure and regulatory standards in emerging market countries, such as China, are in many respects less stringent than U.S. standards. There is substantially less publicly available information about Chinese issuers than there is about U.S. issuers. Chinese companies with securities listed on U.S. exchanges may be delisted if they do not meet U.S. accounting standards and auditor oversight requirements or due to worsening relations between the U.S. and China, which would significantly decrease the liquidity and value of the securities.
The tax laws and regulations in China are somewhat unclear and are subject to change, possibly with retroactive effect. The interpretation, application and enforcement of such laws and regulations by the applicable authorities may vary over time and from region to region, and could have an adverse effect on the Fund and its shareholders, particularly in relation to tax imposed upon foreign investors’ capital gains. Uncertainties in Chinese tax rules could result in unexpected tax liabilities for the Fund.
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| KraneShares 2x Long PDD Daily ETF | Emerging Markets Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Emerging Markets Risk. The Fund may invest in markets that are considered to be “emerging.” Investing in securities listed and traded in emerging markets may be subject to additional risks associated with emerging market economies. Such risks may include: (i) greater market volatility, (ii) greater risk of asset seizures and capital controls, (iii) lower trading volume and liquidity, (iv) greater social, political and economic uncertainty, (v) governmental controls on foreign investments and limitations on repatriation of invested capital, (vi) lower disclosure, corporate governance, auditing and financial reporting standards, (vii) fewer protections of property rights, (viii) restrictions on the transfer of securities or currency, and (ix) settlement and trading practices that differ from U.S. markets. Emerging markets are generally less liquid and less efficient than developed securities markets. The economies of emerging markets, and China in particular, may be heavily reliant upon international trade and may suffer disproportionately if international trading declines or is disrupted. Investments in emerging markets may be considered speculative.
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| KraneShares 2x Long PDD Daily ETF | Non Diversified Fund Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Non-Diversified Fund Risk. Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance.
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| KraneShares 2x Long PDD Daily ETF | Concentration Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Concentration Risk. From time to time, based on market or economic conditions, the Fund may have significant positions in one or more sectors or industries of the market. To the extent the Fund invests more heavily in particular sectors, its performance will be especially sensitive to developments that significantly affect those sectors. Individual sectors may be more volatile, and may perform differently, than the broader market. The industries that constitute a sector may all react in the same way to economic, political or regulatory events. Thus, the Fund is subject to loss due to adverse occurrences that affect one industry or group of industries or sector. While the Fund’s sector and industry exposure is expected to vary over time, the Fund is currently subject to the principal risks of the sectors and industries disclosed herein.
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| KraneShares 2x Long PDD Daily ETF | Consumer Discretionary Sector Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Consumer Discretionary Sector Risk. The success of consumer product manufacturers and retailers is tied closely to the performance of the overall domestic and international economy, interest rates, competition and consumer confidence. Success depends heavily on disposable household income and consumer spending. Changes in demographics and consumer tastes can also affect the demand for, and success of, consumer products in the marketplace.
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| KraneShares 2x Long PDD Daily ETF | E T F Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | ETF Risk. As an ETF, the Fund is subject to the following risks:
Premium/Discount Risk. There may be times when the market price of the Fund’s shares is more than the NAV intra-day (at a premium) or less than the NAV intra-day (at a discount). As a result, shareholders of the Fund may pay more than NAV when purchasing shares and receive less than NAV when selling Fund shares. This risk is heightened in times of market volatility or periods of steep market declines. In such market conditions, market or stop loss orders to sell Fund shares may be executed at prices well below NAV.
Secondary Market Trading Risk. Investors buying or selling shares in the secondary market may pay brokerage commissions, which may be a significant proportional cost for investors buying or selling relatively small amounts of shares. Secondary market trading is subject to bid-ask spreads and trading in Fund shares may be halted by the Exchange because of market conditions or other reasons. Although the Fund’s shares are listed on the Exchange, there can be no assurance that an active trading market for shares will develop or be maintained or that the Fund’s shares will continue to be listed. Trading in the Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Fund’s shares inadvisable, such as extraordinary market volatility. In the event of a trading halt for an extended period of time, the Fund may be unable to execute its investment strategy and shareholders may be unable to liquidate any position in Fund shares.
Authorized Participants Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants. To the extent they exit the business or are otherwise unable to proceed in creation and redemption transactions with the Fund and no other Authorized Participant is able to step forward to create or redeem, shares of the Fund may be more likely to trade at a premium or discount to NAV and possibly face trading halts or delisting.
Cash Transactions Risk. Because the Fund may effect its creations and redemptions at least partially or fully for cash, rather than in-kind securities, an investment in the Fund may be less tax-efficient than an investment in other ETFs as the Fund may recognize a capital gain that it could have avoided by making redemptions in-kind. Cash transactions may involve considerable transaction expenses and taxes, including brokerage fees, that might not have occurred if the Fund utilized in-kind transactions. To the extent any costs associated with cash transactions are not offset by any transaction fees payable by an Authorized Participant, the Fund’s performance could be negatively impacted.
International Closed Market Trading Risk. To the extent the Fund’s investments trade in markets that are closed when the Fund and Exchange are open, there are likely to be deviations between current pricing of an underlying security and the prices at which the underlying securities are valued for purposes of the Fund’s NAV. As a result, Shares may appear to trade at a significant discount or premium to NAV greater than those incurred by other ETFs. In addition, shareholders may not be able to purchase or redeem their shares of the Fund, or purchase or sell shares of the Fund on the Exchange, on days when the NAV of the Fund could be significantly affected by events in the relevant non-U.S. markets.
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| KraneShares 2x Long PDD Daily ETF | Management Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Management Risk. The Fund is actively-managed and may not meet its investment objective based on Krane’s success or failure to implement investment strategies for the Fund. Krane’s evaluations and assumptions regarding investments, markets, trends, and other factors may not successfully achieve the Fund’s investment objective given actual market conditions.
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| KraneShares 2x Long PDD Daily ETF | Market Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Market Risk. The values of the Fund’s holdings could decline generally or could underperform other investments. In addition, there is a risk that policy changes by the U.S. Government, Federal Reserve, and/or other government actors, including those in foreign countries, or changes in global trade relationships could cause volatility in global financial markets, negative sentiment and higher levels of Fund redemptions, which could have a negative impact on the Fund and could result in losses. Geopolitical and other risks, including environmental and public health risks may add to instability in world economies and markets generally. Changes in value may be temporary or may last for extended periods and can occur suddenly and unexpectedly. Further, the Fund is susceptible to the risk that certain investments may be difficult or impossible to sell at a favorable time or price. Market developments may also cause the Fund’s investments to become less liquid and subject to erratic price movements.
Artificial intelligence, including machine learning technology and generative artificial intelligence (collectively, “artificial intelligence”), is rapidly evolving. While the full extent of current or future risks related thereto is not possible to predict, artificial intelligence could significantly disrupt the business models and markets in which the Fund invests and subject the Fund or issuers in which it invests to increased competition, legal and regulatory risks and compliance costs, any of which could have a material adverse effect on the Fund or the business, financial condition and results of operations of the issuers in which it invests. The Fund’s service providers, or the issuers of securities in which the Fund invests may utilize artificial intelligence technologies in business operations. It is possible that the information provided through the use of artificial intelligence could be insufficient, incomplete, inaccurate or biased, or constitute infringement of third-party intellectual property rights, leading to adverse effects for the Fund, including, potentially, operational errors, cybersecurity vulnerabilities and investment losses. Moreover, technological developments in, and the increasingly widespread use of, artificial intelligence technologies may pose risks to the Manager and the Fund. For instance, the Fund may be exposed to competitive risks related to the adoption of artificial intelligence or other new technologies by others within the industry. In addition, investments in technology systems and artificial intelligence by the Manager may not deliver the benefits the Fund expects.
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| KraneShares 2x Long PDD Daily ETF | Tax Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Tax Risk. In order to qualify for the favorable tax treatment available to regulated investment companies, the Fund must satisfy certain income, asset diversification and distribution requirements each year. The Fund’s pursuit of its investment strategy will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund may make certain investments, the treatment of which for these purposes is unclear. The Fund’s investments in issuers whose control persons are not certain creates a risk that tax authorities may retrospectively deem the Fund to have failed the asset diversification requirements. If the Fund were to fail the favorable tax treatment requirements, it would be taxed in the same manner as an ordinary corporation, which would adversely affect its performance.
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| KraneShares 2x Long PDD Daily ETF | Investments In Investment Companies Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Investments in Investment Companies Risk. The Fund may invest in other investment companies, including those advised, sponsored or otherwise serviced by Krane and/or its affiliates. The Fund will indirectly be exposed to the risks of investments by such funds and will incur its pro rata share of the underlying fund’s expenses. Additionally, investments in ETFs are subject to ETF Risk. Krane is subject to conflicts of interest in allocating Fund assets to investment companies that are advised, sponsored or otherwise serviced by Krane and/or its affiliates. To the extent that the Fund invests in investment companies or other pooled investment vehicles that are not registered pursuant to the 1940 Act, it will not enjoy the protections of the U.S. law.
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| KraneShares 2x Long PDD Daily ETF | Cash And Cash Equivalents Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Cash and Cash Equivalents Risk. The Fund may hold cash or cash equivalents. Generally, such positions offer less potential for gain than other investments. This is particularly true when the market for other investments in which the Fund may invest is rapidly rising. If the Fund holds cash uninvested it will be subject to the credit risk of the depositing institution holding the cash.
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| KraneShares 2x Long PDD Daily ETF | Operational And Cybersecurity Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Operational and Cybersecurity Risk. The Fund, Krane, its service providers and your ability to transact with the Fund may be negatively impacted due to operational matters arising from, among other problems, human errors, systems and technology disruptions or failures, or cybersecurity incidents. Cybersecurity incidents may allow an unauthorized party to gain access to fund assets, customer data, or proprietary information, or cause the Fund or its service providers, as well as the securities trading venues and their service provides, to suffer data corruption or lose operational functionality. It is not possible for Krane or the other Fund service providers to identify all of the cybersecurity or other operational risks that may affect the Fund or to develop processes and controls to completely eliminate or mitigate their occurrence or effects. |
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| KraneShares 2x Long PDD Daily ETF | Fixed Income Securities Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Fixed Income Securities Risk. Fixed income securities are subject to credit risk and interest rate risk. Credit risk refers to the possibility that the issuer of a security will not make timely interest payments or repay the principal of the debt issued (i.e., default on its obligations). A downgrade or default on securities held by the Fund could adversely affect the Fund’s performance. Generally, the longer the maturity and the lower the credit quality of a security, the more sensitive it is to credit risk. Interest rate risk refers to fluctuations in the value of a debt resulting from changes in the level of interest rates. When interest rates go up, the prices of most debt instruments generally go down; and when interest rates go down, the prices of most debt instruments generally go up. Debt instruments with longer durations tend to be more sensitive to interest rate changes, typically making them more volatile. Interest rates have recently increased and may continue increasing, thereby heightening the risks associated with rising interest rates.
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| KraneShares 2x Long PDD Daily ETF | High Portfolio Turnover Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | High Portfolio Turnover Risk. Daily rebalancing of the Fund’s holdings pursuant to its daily investment objective causes a much greater number of portfolio transactions when compared to most ETFs. Additionally, active secondary market trading of the Fund’s shares could cause more frequent creation and redemption activities, which would increase the number of portfolio transactions. High levels of portfolio transactions may cause higher transaction costs because of increased broker commissions resulting from such transactions and increased taxable capital gains. The Fund calculates portfolio turnover without including the short-term cash instruments or derivative transactions that comprise most of the Fund’s trading. As such, if the Fund’s extensive use of derivative instruments were reflected, the calculated portfolio turnover rate would be significantly higher.
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| KraneShares 2x Long PDD Daily ETF | Counterparty Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Counterparty Risk. A counterparty (the other party to a transaction or an agreement or the party with whom the Fund executes transactions) to a transaction with the Fund may be unable or unwilling to make timely principal, interest or settlement payments, or otherwise honor its obligations. If this occurs, it could result in a reduction in the NAV of the Fund and could impair the Fund’s ability to achieve its investment objective. The counterparty risk associated with the Fund’s investments will be greater if the Fund uses only a limited number of counterparties. If there are only a couple of potential counterparties, the Fund, subject to applicable law, may enter into transactions with as few as one counterparty at any time.
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| KraneShares 2x Long PDD Daily ETF | Indirect Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Indirect Investment Risk. The issuer is not affiliated with the Trust, the Adviser or any affiliates thereof and is not involved with this offering in any way, and has no obligation to consider the Fund in taking any corporate actions that might affect the value of the Fund. The Trust, the Fund and any affiliate are not responsible for the performance of the issuer and make no representation as to the performance of the issuer. Investing in the Fund is not equivalent to investing in the issuer. Fund shareholders will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to the issuer.
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| KraneShares 2x Long PDD Daily ETF | Effects Of Compounding And Market Volatility Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Effects of Compounding and Market Volatility Risk. The Fund seeks daily investment results, before fees and expenses, of two times (200%) the daily percentage change of the Underlying Stock and the Fund’s performance for periods greater than a trading day will be the result of each day’s returns compounded over the period, which is very likely to differ from the Underlying Stock’s performance, before fees and expenses. The impact of compounding becomes more pronounced as volatility and holding periods increase and will impact each shareholder differently depending on the period of time an investment in the Fund is held and the volatility of the issuer during the shareholder’s holding period. For a fund aiming to replicate two times the daily performance of an Underlying Stock, if adverse daily performance of the Underlying Stock reduces the amount of a shareholder’s investment, any further adverse daily performance will lead to a smaller dollar loss because the shareholder’s investment had already been reduced by the prior adverse performance. Equally, however, if the favorable daily performance of the Underlying Stock increases the amount of a shareholder’s investment, the dollar amount lost due to future adverse performance will increase because the shareholder’s investment has increased.
The chart below provides examples of how Underlying Stock volatility could affect the Fund’s performance. Fund performance for periods greater than one single day can be estimated given any set of assumptions for the following factors: a) Underlying Stock volatility; b) Underlying Stock’s performance; c) period of time; d) financing rates associated with leveraged exposure; e) other Fund expenses; and f) the Underlying Stock’s dividends. The chart below illustrates the impact of two principal factors – Underlying Stock volatility and performance – on Fund performance. The chart shows estimated Fund returns for a number of combinations of Underlying Stock volatility and performance over a one-year period. Performance shown in the chart assumes that (i) there were no Fund expenses; and (ii) borrowing rates (needed to obtain a leveraged long exposure) of 0%. If Fund expenses and/or actual borrowing/lending rates were reflected, the estimated returns would be lower than those shown. Particularly during periods of higher Underlying Stock volatility, compounding will cause results for periods longer than a trading day to vary from the performance of the Underlying Stock. As shown in the chart, the Fund would be expected to lose 6.1% if the Underlying Stock provided no return over a one-year period during which the Underlying Stock experienced annualized volatility of 25%. At higher ranges of volatility, there is a chance of a significant loss of value in the Fund, even if the Underlying Stock return is flat.
For instance, if the Underlying Stock annualized volatility is 100%, the Fund would be expected to lose 63.3% of its value, even if the cumulative Underlying Stock return for the year was 0%. Areas shaded red (or dark gray) represent those scenarios where the Fund can be expected to return less than 200% of the performance of the Underlying Stock and those shaded green (or light gray) represent those scenarios where the Fund can be expected to return more than 200% of the performance of the Underlying Stock. The Fund’s actual returns may be significantly better or worse than the returns shown below as a result of any of the factors discussed above or in “Tracking Error Risk” below.
The Underlying Stock’s annualized historical volatility rate for the five-year period ended May 31, 2026, was 67.9%. During this five-year period, the Underlying Stock’s highest volatility rate over a 12-month period was 58.6% and volatility for a shorter period of time may have been substantially higher. The Underlying Stock’s annualized performance for the five-year period ended May 31, 2026, was -9.8%. Historical volatility and performance are not indications of what the Underlying Stock volatility and performance will be in the future. The volatility of instruments that reflect the value of the Underlying Stock, such as swaps, may differ from the volatility of the Underlying Stock.
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| KraneShares 2x Long PDD Daily ETF | Correlation Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Correlation Risk. A number of factors may affect the Fund’s ability to achieve a high degree of correlation with Underlying Stock, and there is no guarantee that the Fund will achieve a high degree of correlation. Failure to achieve a high degree of correlation may prevent the Fund from achieving its investment objective, and the percentage change of the Fund’s NAV each day may differ, perhaps significantly in amount, and possibly even direction, from 200% of the percentage change of Underlying Stock on such day.
In order to achieve a high degree of correlation with Underlying Stock, the Fund seeks to rebalance its portfolio daily to keep exposure consistent with its investment objective. Being materially under- or overexposed to Underlying Stock may prevent the Fund from achieving a high degree of correlation with Underlying Stock and may expose the Fund to greater leverage risk. Market disruptions or closure, regulatory restrictions, market volatility, illiquidity in the markets for the financial instruments in which the Fund invests, and other factors will adversely affect the Fund’s ability to adjust exposure to requisite levels. The target amount of portfolio exposure is impacted dynamically by Underlying Stock’s movements, including intraday movements. Because of this, it is unlikely that the Fund will have perfect 200% exposure during the day or at the end of each day and the likelihood of being materially under- or overexposed is higher on days when Underlying Stock is volatile, particularly when Underlying Stock is volatile at or near the close of the trading day.
A number of other factors may also adversely affect the Fund’s correlation with Underlying Stock, including fees, expenses, transaction costs, financing costs associated with the use of derivatives, income items, valuation methodology, accounting standards and disruptions or illiquidity in the markets for the securities or financial instruments in which the Fund invests. The Fund may take or refrain from taking positions in order to improve tax efficiency, comply with regulatory restrictions, or for other reasons, each of which may negatively affect the Fund’s correlation with Underlying Stock. The Fund may also be subject to large movements of assets into and out of the Fund, potentially resulting in the Fund being under- or overexposed to Underlying Stock. Additionally, the Fund’s underlying investments and/or reference assets may trade on markets that may not be open on the same day as the Fund, which may cause a difference between the changes in the daily performance of the Fund and changes in the performance of Underlying Stock. Any of these factors could decrease correlation between the performance of the Fund and Underlying Stock and may hinder the Fund’s ability to meet its daily investment objective on or around that day.
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| KraneShares 2x Long PDD Daily ETF | Leverage Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Leverage Risk. The Fund obtains investment exposure in excess of its net assets by utilizing leverage and may lose more money in market conditions that are adverse to its investment objective than a fund that does not utilize leverage. An investment in the Fund is exposed to the risk that a decline in the daily performance of the Underlying Stock will be magnified. This means that an investment in the Fund will be reduced by an amount equal to 2% for every 1% daily decline in the Underlying Stock, not including the costs of financing leverage and other operating expenses, which would further reduce its value. The Fund could theoretically lose an amount greater than its net assets in the event the Underlying Stock declines more than 50%. Leverage will also have the effect of magnifying any differences in the Fund performance’s correlation with the Underlying Stock.
Due to the limited availability of necessary investments or financial instruments, the Fund could, among other things, as a defensive measure, limit or suspend creations or redemptions of Creation Units until the adviser determines that the requisite exposure to the Underlying Stock is obtainable. During the period that creation or redemptions are affected, the Fund’s shares could trade at a significant premium or discount to their net asset value or the bid-ask spread of the Fund’s shares could widen significantly. In the case of a period during which creations are suspended, the Fund could experience significant redemptions, which may cause the Fund to sell portfolio securities at unfavorable prices and increased transaction and other costs and make greater taxable distributions to shareholders of the Fund.
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| KraneShares 2x Long PDD Daily ETF | Swap Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Swap Risk. Swap agreements are entered into primarily with major global financial institutions for a specified period which may range from one day to more than one year. In a standard swap transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined reference or underlying securities or instruments. The gross return to be exchanged or swapped between the parties is calculated based on a notional amount or the return on or change in value of a particular dollar amount invested in a basket of securities representing a particular index. Total return swaps are subject to counterparty risk, which relates to credit risk of the counterparty and liquidity risk of the swaps themselves. The primary risks associated with the use of swaps are mispricing or improper valuation, imperfect correlation between movements of the notional value of a swap and the price of the reference asset, and the failure of a counterparty to perform. If a swap counterparty’s creditworthiness for an “over-the-counter” swap declines, the value of the swap would also likely decline. There is no guarantee that the Fund could eliminate its exposure under an outstanding swap by entering into offsetting swap with the same or another party. The number of counterparties available to enter into swaps with the Fund is limited. The risk of loss with respect to swaps generally is limited to the net amount of payments that the Fund is contractually obligated to make or, in the case of the other party to a swap defaulting, the net amount of payments that the Fund is contractually entitled to receive.
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| KraneShares 2x Long PDD Daily ETF | Trading Halt Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Trading Halt Risk. Although the Underlying Stock’s shares are listed for trading on an exchange, there can be no assurance that an active trading market for such shares will be available at all times and the exchange may halt trading of such shares in certain circumstances. A halt in trading in the Underlying Stock’s shares is expected, in turn, to result in a halt in the trading in the Fund’s shares. Trading in the Underlying Stock’s and/or Fund’s shares on the exchange may be halted due to market conditions or for reasons that, in the view of the exchange, make trading in the Underling Stock’s and/or Fund’s shares inadvisable. In addition, trading in Underlying Stock’s and/or Fund’s shares on an exchange is subject to trading halts caused by extraordinary market volatility pursuant to exchange “circuit breaker” rules. In the event of a trading halt for an extended period of time, the Fund may be unable to execute arrangements with swap counterparties that are necessary to implement the Fund’s investment strategy.
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| KraneShares 2x Long PDD Daily ETF | E Commerce Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | E-Commerce Risk. The performance of the Underlying Stock, and consequently the Fund’s performance, is subject to e-commerce risk. E-commerce companies are subject to various risks that may cause significant losses, including risks related to warehousing and logistics capacity and deficiency issues, online security, system reliability, privacy failures, customer disputes, payment fraud, and website traffic decreases. Laws generally vary by country, including the application of taxes, which may create challenges for some e-commerce companies seeking to achieve scale. Companies in the e-commerce sector are especially subject to the adverse effects of economic recession and competition from new entrants in their fields of business.
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| KraneShares 2x Long PDD Daily ETF | Rebalancing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Rebalancing Risk. If for any reason the Fund is unable to rebalance all or a portion of its portfolio, or if all or a portion of the portfolio is rebalanced incorrectly, the Fund’s investment exposure may not be consistent with the Fund’s investment objective. In these instances, the Fund may have investment exposure to the Underlying Stock that is significantly greater or less than its stated multiple. As a result, the Fund may be more exposed to leverage risk than if it had been properly rebalanced and may not achieve its investment objective.
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| KraneShares 2x Long PDD Daily ETF | Intraday Investment Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | Intraday Investment Risk. The intra-day performance of Fund shares traded in the secondary market will be different from the performance of the Fund when measured from the close of the market on a given trading day until the close of the market on the subsequent trading day. An investor that purchases shares intra-day may experience performance that is greater than, or less than, the Fund’s stated investment objective.
If there is a significant intra-day market event and/or the securities experience a significant change in value, the Fund may not meet its investment objective or may be unable to rebalance its portfolio appropriately, resulting in significant losses or reduced gains. In response to significant intraday market volatility, among other actions, the Adviser may determine to trade a portion or all of the rebalance trade or the Fund prior to market close, which may result in the Fund not achieving its investment objective. Additionally, the Fund’s Shares traded on the secondary market may experience significant premiums or discounts, or widened bid-ask spreads.
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| KraneShares 2x Long PDD Daily ETF | Pdd Holdings Inc Investing Risk [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | PDD Holdings Inc. Investing Risk. Issuer-specific attributes may cause an investment held by the Fund to be more volatile than the market generally. The value of an individual security or particular type of security may be more volatile than the market as a whole and may perform differently from the value of the market as a whole. As of the date of this prospectus, in addition to the risks associated with companies in the consumer discretionary sector, PDD faces risks associated with: the highly competitive nature of the e-commerce industry; economic and market uncertainty; reductions in demand for its products; potential concentration of revenues in a few large clients; geopolitical events and pandemics; adequate protection of technology or other intellectual property; exchange rates; reliance on third parties to manufacture products; possible shortages of equipment or materials needed to manufacture products; cybersecurity attacks and data breaches; system failures or outages; potential incompatibility of product with some or all industry standard software and hardware; increases in costs; adverse government regulations; regulatory compliance costs; litigation; taxes; indebtedness; and the ability to attract and retain high quality talent.
The Underlying Stock is subject to many risks that can negatively impact its revenue and viability including, but are not limited to price volatility risk, management risk, inflation risk, global economic risk, growth risk, supply and demand risk, operations risk, regulatory risk, environmental risk, terrorism risk and the risk of natural disasters. The Underlying Stock performance may be affected by trends in commerce, and cloud computing, changes in the economic conditions in China and globally, international trade policies, the company’s investment transactions and changes in governmental regulations. The Fund’s daily returns may be affected by many factors but will depend on the performance and volatility of the Underlying Stock.
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| KraneShares 2x Long PDD Daily ETF | Risk Lose Money [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Risk [Text Block] | An investment in the Fund involves the risk of total loss. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long PDD Daily ETF | Risk Not Insured Depository Institution [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | An investment in the Fund is not a deposit with a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| KraneShares 2x Long PDD Daily ETF | Risk Nondiversified Status [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Risk [Text Block] | Because the Fund is non-diversified and may invest a greater portion of its assets in fewer issuers than a diversified fund, changes in the market value of a single portfolio holding could cause greater fluctuations in the Fund’s share price than would occur in a diversified fund. This may increase the Fund’s volatility and cause the performance of a single portfolio holding or a relatively small number of portfolio holdings to have a greater impact on the Fund’s performance. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||