v3.26.1
Investment Risks - Defiance China Robotics ETF
Aug. 10, 2026
China A-Shares Risk Member  
Prospectus [Line Items]  
Risk [Text Block] China A-Shares Risk. A-Shares are issued by companies incorporated in mainland China and are denominated in Chinese renminbi and traded on the two main Chinese exchanges: SSE and SZSE. Foreign investors can access investments in A-Shares by obtaining a Qualified Foreign Institutional Investor (“QFII”) or a Renminbi Qualified Foreign Institutional Investor (“RQFII”) license, as well as through the Stock Connect Program, which is a securities trading and clearing program with an aim to achieve mutual stock market access between the China and Hong Kong markets. Stock Connect was developed by Hong Kong Exchanges and Clearing Limited, the SSE (in the case of Shanghai Connect) or the SZSE (in the case of Shenzhen Connect), and the China Securities Depository and Clearing Corporation Limited (“CSDCC”). The Fund currently intends to gain exposure to A-Shares through the Stock Connect Programs. The markets on which A-Shares trade are considered emerging markets characterized by generally low trading volume and less market liquidity due to various factors. For example, investments in A-Shares are subject to various regulations and limits, and the recoupment or repatriation of assets invested in A-Shares is subject to restrictions imposed by the Chinese government. In addition, investors from outside mainland China may face difficulties or prohibitions accessing certain A-Shares that are part of a restricted list in countries such as the U.S. A-Shares may also be subject to frequent and widespread trading halts, which can increase pricing volatility and cause the A-Shares to become illiquid. Trading suspensions in certain stock could lead to greater market execution, clearing and settlement risks and costs for the Fund, and the creation and redemption of Creation Units (as defined below) may also be disrupted. These risks, among others, could adversely affect the value of the Fund’s investments. Collateral Securities Risk. Collateral may include obligations issued or guaranteed by the U.S. government, its agencies and instrumentalities, including bills, notes and bonds issued by the U.S. Treasury, money market funds and corporate debt securities, such as commercial paper. Some securities issued or guaranteed by federal agencies and U.S. government-sponsored instrumentalities may not be backed by the full faith and credit of the United States, in which case the investor must look principally to the agency or instrumentality issuing or guaranteeing the security for ultimate repayment, and may not be able to assert a claim against the United States itself in the event that the agency or instrumentality does not meet its commitment. The U.S. government, its agencies and instrumentalities do not guarantee the market value of their securities, and consequently, the value of such securities may fluctuate. Although the Fund may hold securities that carry U.S. government guarantees, these guarantees do not extend to shares of the Fund. The Fund’s investments in U.S. government securities will change in value in response to interest rate changes and other factors, such as the perception of an issuer’s creditworthiness. Money market funds are subject to management fees and other expenses. Therefore, investments in money market funds will cause the Fund to bear indirectly a proportional share of the fees and costs of the money market funds in which it invests. At the same time, the Fund will continue to pay its own management fees and expenses with respect to all of its assets, including any portion invested in the shares of the money market fund. It is possible to lose money by investing in money market funds. Corporate debt securities such as commercial paper generally are short-term unsecured promissory notes issued by businesses. Corporate debt may be rated investment-grade or below investment-grade and may carry variable or floating rates of interest. Corporate debt securities carry both credit risk and interest rate risk. Credit risk is the risk that the Fund could lose money if the issuer of a corporate debt security is unable to pay interest or repay principal when it is due. Interest rate risk is the risk that interest rates rise and fall over time. For example, the value of fixed-income securities generally decrease when interest rates rise, which may cause the Fund’s value to decrease. Also, investments in fixed-income securities with longer maturities fluctuate more in response to interest rate changes.
Concentration Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Concentration Risk. The Fund’s investments will be concentrated in a particular industry or group of related industries to the extent that the Index is so concentrated. In such event, the value of the Shares may rise and fall more than the value of shares of a fund that invests in securities of companies in a broader range of industries.
Commercial and Industrial Electric Products Industry Group Risk. Companies in the Commercial and Industrial Electric Products Industry Group are sensitive to economic conditions and capital spending levels in industrial, construction, infrastructure, and utility markets. A decline in economic activity or delays in capital projects may reduce demand for these companies’ products and services. These companies may be adversely affected by rapid technological change, product obsolescence, and the need for ongoing investment in innovation. The Commercial and Industrial Electric Products Industry Group is subject to regulatory and policy risks, including changes in environmental, energy, safety, and trade regulations, which may increase costs or reduce demand. In addition, companies in the Commercial and Industrial Electric Products Industry Group depend on complex global supply chains and may be negatively impacted by supply disruptions, material shortages, tariffs, or geopolitical events. As a result, the Fund’s investments in the Commercial and Industrial Electric Products Industry Group may be more volatile than investments in more broadly diversified funds.
Concentration Risk, Commercial And Industrial Electric Products Industry Group Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Commercial and Industrial Electric Products Industry Group Risk. Companies in the Commercial and Industrial Electric Products Industry Group are sensitive to economic conditions and capital spending levels in industrial, construction, infrastructure, and utility markets. A decline in economic activity or delays in capital projects may reduce demand for these companies’ products and services. These companies may be adversely affected by rapid technological change, product obsolescence, and the need for ongoing investment in innovation. The Commercial and Industrial Electric Products Industry Group is subject to regulatory and policy risks, including changes in environmental, energy, safety, and trade regulations, which may increase costs or reduce demand. In addition, companies in the Commercial and Industrial Electric Products Industry Group depend on complex global supply chains and may be negatively impacted by supply disruptions, material shortages, tariffs, or geopolitical events. As a result, the Fund’s investments in the Commercial and Industrial Electric Products Industry Group may be more volatile than investments in more broadly diversified funds.
Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Counterparty risk is the risk that a counterparty to Fund transactions (e.g., swap transactions) will be unable or unwilling to perform its contractual obligation to the Fund. The Fund expects to use swap agreements to gain exposure to Chinese Robotics Companies in order to achieve its investment objective. Through these investments and related arrangements, the Fund is exposed to the risk that the counterparty may be unwilling or unable to make timely payments contemplated by such arrangements or otherwise to meet its contractual obligations (i.e., counterparty credit risk). If the counterparty becomes bankrupt or defaults on (or otherwise becomes unable or unwilling to perform) its payment or other obligations to the Fund, the Fund may not receive the full amount it is entitled to receive or may experience delays in recovering the collateral or other assets held by, or on behalf of, the counterparty. If this occurs, the value of your Shares in the Fund will decrease.
In addition, the Fund may enter into swap agreements with a limited number of counterparties, which may increase the Fund’s exposure to counterparty credit risk. To the extent the Fund’s counterparties are concentrated in the financial services sector, the Fund bears the risk that those counterparties may be adversely affected by legislative or regulatory changes, adverse market conditions, increased competition, and/or wide scale credit losses resulting from financial difficulties or borrowers affecting that economic sector. Further, there is a risk that no suitable counterparties will be willing to enter into, or continue to enter into, transactions with the Fund and, as a result, the Fund may not be able to achieve its investment objective.
Currency Exchange Rate Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Currency Exchange Rate Risk. The Fund invests primarily in investments denominated in non-U.S. currencies or in securities that provide exposure to such currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies will affect the value of the Fund’s investment and the value of your Shares. Currency exchange rates can be very volatile and can change quickly and unpredictably. As a result, the value of an investment in the Fund may change quickly and without warning and you may lose money.
Derivatives Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Derivatives Risk. The Fund’s derivative investments have risks, including the imperfect correlation between the value of such instruments and the underlying assets or index; the loss of principal, including the potential loss of amounts greater than the initial amount invested in the derivative instrument; and illiquidity of the derivative investments. Certain of the Fund’s transactions in derivatives could affect the amount, timing, and character of distributions to shareholders, which may result in the Fund realizing
more short-term capital gain and ordinary income subject to tax at ordinary income tax rates than it would if it did not engage in such transactions, which may adversely impact the Fund’s after-tax returns. To the extent the Fund invests in such derivative instruments, the value of the Fund’s portfolio is likely to experience greater volatility over short-term periods.
Swap Agreements Risk. Swap agreements are contracts among the Fund and a counterparty to exchange the return of the pre-determined underlying investment (such as the rate of return of the index or basket of equity securities). Swap agreements may be negotiated bilaterally and traded over-the-counter (“OTC”) between two parties or, for certain standardized swaps, must be exchange-traded through a futures commission merchant (“FCM”) and/or cleared through a clearinghouse that serves as a central counterparty. Swap agreements may be subject to fees and expenses, and by investing in swaps indirectly through the Fund, a shareholder will bear the expenses of such derivatives in addition to expenses of the Fund. Risks associated with the use of swap agreements are different from those associated with ordinary portfolio securities transactions, due in part to the fact they could be considered illiquid and many swaps trade on the OTC market. Swaps are particularly subject to counterparty credit, correlation, valuation, liquidity and leveraging risks. While exchange trading and central clearing are intended to reduce counterparty credit risk and increase liquidity, they do not make swap transactions risk-free. Additionally, applicable regulators have adopted rules imposing certain margin requirements, including minimums, on OTC swaps, which may result in the Fund and its counterparties posting higher margin amounts for OTC swaps, which could increase the cost of swap transactions to the Fund and impose added operational complexity.
Swaps Capacity Risk. If the Fund’s ability to obtain exposure to swaps consistent with its investment objective is disrupted for any reason including, for example, limited liquidity in the market for Chinese Robotics Companies, a disruption to the market for Chinese Robotics Companies, or as a result of margin requirements or other limitations imposed by the Fund’s swaps dealers or the SEC, CFTC or other regulators, the Fund may not be able to achieve its investment objective and may experience significant losses.
In such circumstances, the Sub-Adviser intends to take such action as it believes appropriate and in the best interest of the Fund. Any disruption in the Fund’s ability to obtain exposure to Chinese Robotics Companies swaps may cause the Fund’s performance to deviate from the performance of Chinese Robotics Companies.
Derivatives Risk, Swap Agreements Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Swap Agreements Risk. Swap agreements are contracts among the Fund and a counterparty to exchange the return of the pre-determined underlying investment (such as the rate of return of the index or basket of equity securities). Swap agreements may be negotiated bilaterally and traded over-the-counter (“OTC”) between two parties or, for certain standardized swaps, must be exchange-traded through a futures commission merchant (“FCM”) and/or cleared through a clearinghouse that serves as a central counterparty. Swap agreements may be subject to fees and expenses, and by investing in swaps indirectly through the Fund, a shareholder will bear the expenses of such derivatives in addition to expenses of the Fund. Risks associated with the use of swap agreements are different from those associated with ordinary portfolio securities transactions, due in part to the fact they could be considered illiquid and many swaps trade on the OTC market. Swaps are particularly subject to counterparty credit, correlation, valuation, liquidity and leveraging risks. While exchange trading and central clearing are intended to reduce counterparty credit risk and increase liquidity, they do not make swap transactions risk-free. Additionally, applicable regulators have adopted rules imposing certain margin requirements, including minimums, on OTC swaps, which may result in the Fund and its counterparties posting higher margin amounts for OTC swaps, which could increase the cost of swap transactions to the Fund and impose added operational complexity.
Derivatives Risk, Swaps Capacity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Swaps Capacity Risk. If the Fund’s ability to obtain exposure to swaps consistent with its investment objective is disrupted for any reason including, for example, limited liquidity in the market for Chinese Robotics Companies, a disruption to the market for Chinese Robotics Companies, or as a result of margin requirements or other limitations imposed by the Fund’s swaps dealers or the SEC, CFTC or other regulators, the Fund may not be able to achieve its investment objective and may experience significant losses.In such circumstances, the Sub-Adviser intends to take such action as it believes appropriate and in the best interest of the Fund. Any disruption in the Fund’s ability to obtain exposure to Chinese Robotics Companies swaps may cause the Fund’s performance to deviate from the performance of Chinese Robotics Companies.
Emerging Markets Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Emerging Markets Risk. The Fund invests primarily in companies organized in emerging market nations, specifically China. Investments in securities and instruments traded in developing or emerging markets, or that provide exposure to such securities or markets, can involve additional risks relating to political, economic, or regulatory conditions not associated with investments in U.S. securities and instruments or investments in more developed international markets. Such conditions may impact the ability of the Fund to buy, sell or otherwise transfer securities, adversely affect the trading market and price for Shares and cause the Fund to decline in value.
Capital Controls and Sanctions Risk. Economic conditions, such as volatile currency exchange rates and interest rates, political events, military action and other conditions may, without prior warning, lead to government intervention (including intervention by the U.S. government with respect to foreign governments, economic sectors, foreign companies and related securities and interests) and the imposition of capital controls and/or sanctions, which may also include retaliatory actions of one government against another government, such as seizure of assets. Capital controls and/or sanctions include the prohibition of, or restrictions on, the ability to transfer currency, securities or other assets. Levies may be placed on profits repatriated by foreign entities (such as the Fund). Capital controls and/or sanctions may also impact the ability of the Fund to buy, sell or otherwise transfer securities or currency, negatively impact the value and/or liquidity of such instruments, adversely affect the trading market and price for Shares, and cause the Fund to decline in value.
Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally. Such geopolitical and other events may also disrupt securities markets and, during such market disruptions, the Fund’s exposure to the other risks described herein will likely increase. Each of the foregoing may negatively impact the Fund’s investments.
Emerging Markets Risk, Capital Controls And Sanctions Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Capital Controls and Sanctions Risk. Economic conditions, such as volatile currency exchange rates and interest rates, political events, military action and other conditions may, without prior warning, lead to government intervention (including intervention by the U.S. government with respect to foreign governments, economic sectors, foreign companies and related securities and interests) and the imposition of capital controls and/or sanctions, which may also include retaliatory actions of one government against another government, such as seizure of assets. Capital controls and/or sanctions include the prohibition of, or restrictions on, the ability to transfer currency, securities or other assets. Levies may be placed on profits repatriated by foreign entities (such as the Fund). Capital controls and/or sanctions may also impact the ability of the Fund to buy, sell or otherwise transfer securities or currency, negatively impact the value and/or liquidity of such instruments, adversely affect the trading market and price for Shares, and cause the Fund to decline in value.
Emerging Markets Risk, Geopolitical Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Geopolitical Risk. Some countries and regions in which the Fund invests have experienced security concerns, war or threats of war and aggression, terrorism, economic uncertainty, natural and environmental disasters and/or systemic market dislocations that have led, and in the future may lead, to increased short-term market volatility and may have adverse long-term effects on the U.S. and world economies and markets generally. Such geopolitical and other events may also disrupt securities markets and, during such market disruptions, the Fund’s exposure to the other risks described herein will likely increase. Each of the foregoing may negatively impact the Fund’s investments.
Equity Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Equity Market Risk. The equity securities held in the Fund’s portfolio may experience sudden, unpredictable drops in value or long periods of decline in value. This may occur because of factors that affect securities markets generally or factors affecting specific issuers, industries, or sectors in which the Fund invests. Common stocks are generally exposed to greater risk than other types of securities, such as preferred stock and debt obligations, because common stockholders generally have inferior rights to receive payment from issuers. In addition, local, regional or global events such as war, including Russia’s invasion of Ukraine, regional armed conflict, acts of terrorism, market volatility related to global trade policy and the imposition of tariffs, the spread of infectious diseases or other public health issues (such as the global pandemic caused by the COVID-19 virus), recessions, rising inflation, or other events could have a significant negative impact on the Fund and its investments. Such events may affect certain geographic regions, countries, sectors and industries more significantly than others. Such events could adversely affect the prices and liquidity of the Fund’s portfolio securities or other instruments and could result in disruptions in the trading markets.
ETF Risks Member  
Prospectus [Line Items]  
Risk [Text Block] ETF Risks. The Fund is an ETF, and, as a result of an ETF’s structure, it is exposed to the following risks:
Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
Cash Redemption Risk. The Fund’s investment strategy may require it to redeem shares for cash or to otherwise include cash as part of its redemption proceeds. The Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used.
Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.
Trading. Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. There can be no assurance that an active trading market for such Shares will develop or be maintained. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares, and this could lead to differences between the market price of the Shares and the underlying value of those Shares. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.
ETF Risks, Authorized Participants, Market Makers, And Liquidity Providers Concentration Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Authorized Participants, Market Makers, and Liquidity Providers Concentration Risk. The Fund has a limited number of financial institutions that may act as Authorized Participants (“APs”). In addition, there may be a limited number of market makers and/or liquidity providers in the marketplace. To the extent either of the following events occur, Shares may trade at a material discount to NAV and possibly face delisting: (i) APs exit the business or otherwise become unable to process creation and/or redemption orders and no other APs step forward to perform these services, or (ii) market makers and/or liquidity providers exit the business or significantly reduce their business activities and no other entities step forward to perform their functions.
ETF Risks, Cash Redemption Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Cash Redemption Risk. The Fund’s investment strategy may require it to redeem shares for cash or to otherwise include cash as part of its redemption proceeds. The Fund may be required to sell or unwind portfolio investments to obtain the cash needed to distribute redemption proceeds. This may cause the Fund to recognize a capital gain that it might not have recognized if it had made a redemption in-kind. As a result, the Fund may pay out higher annual capital gain distributions than if the in-kind redemption process was used.
ETF Risks, Costs Of Buying Or Selling Shares Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Costs of Buying or Selling Shares. Due to the costs of buying or selling Shares, including brokerage commissions imposed by brokers and bid/ask spreads, frequent trading of Shares may significantly reduce investment results and an investment in Shares may not be advisable for investors who anticipate regularly making small investments.
ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Shares May Trade at Prices Other Than NAV. As with all ETFs, Shares may be bought and sold in the secondary market at market prices. Although it is expected that the market price of Shares will approximate the Fund’s NAV, there may be times when the market price of Shares is more than the NAV intra-day (premium) or less than the NAV intra-day (discount) due to supply and demand of Shares or during periods of market volatility. This risk is heightened in times of market volatility, periods of steep market declines, and periods when there is limited trading activity for Shares in the secondary market, in which case such premiums or discounts may be significant.
ETF Risks, Trading Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Trading. Although Shares are listed for trading on The Nasdaq Stock Market LLC (the “Exchange”) and may be traded on U.S. exchanges other than the Exchange, there can be no assurance that Shares will trade with any volume, or at all, on any stock exchange. There can be no assurance that an active trading market for such Shares will develop or be maintained. In stressed market conditions, the liquidity of Shares may begin to mirror the liquidity of the Fund’s underlying portfolio holdings, which can be significantly less liquid than Shares, and this could lead to differences between the market price of the Shares and the underlying value of those Shares. Because securities held by the Fund may trade on foreign exchanges that are closed when the Fund’s primary listing exchange is open, the Fund is likely to experience premiums and discounts greater than those of domestic ETFs.
Foreign Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Foreign Securities Risk. Investments in non-U.S. securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in non-U.S. securities may be subject to risk of loss due to foreign currency fluctuations or to political or economic instability. There may be less information publicly available about a non-U.S. issuer than a U.S. issuer. Investments in non-U.S. securities also may be subject to withholding or other taxes and may be subject to additional trading, settlement, custodial, and operational risks. These and other factors can make investments in the Fund more volatile and potentially less liquid than other types of investments.
Geographic Investment Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Geographic Investment Risk. The Fund invests a significant portion of its assets in the securities of companies in a single country and, as a result, it is more likely to be impacted by events or conditions affecting that country.
China and Hong Kong-Specific Risk. Investments in Chinese issuers subject the Fund to risks specific to China. Investments in the securities of Chinese issuers that trade on an exchange in Hong Kong subject the Fund to risks specific to China and Hong Kong. China and Hong Kong may be subject to considerable degrees of economic, political and social instability. China and Hong Kong are developing markets and demonstrate significantly higher volatility from time to time in comparison to developed markets. Over the past 25 years, the Chinese government has undertaken reform of economic and market practices and is expanding 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. 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. Export growth continues to be a major driver of China’s rapid economic growth. Reduction in spending on Chinese products and services, institution of tariffs or other trade barriers, or a downturn in any of the economies of China’s key trading partners may have an adverse impact on the Chinese economy. China is also vulnerable economically to the impact of a public health crisis, which could depress consumer demand, reduce economic output, and potentially lead to market closures, travel restrictions, and quarantines, all of which would negatively impact China’s economy and could affect the economies of its trading partners. Further, any attempt by China to tighten its control over Hong Kong’s political, economic, legal or social policies may result in an adverse effect on Hong Kong’s markets
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 a shell company in a foreign jurisdiction, such as the Cayman Islands. The shell company 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 shell company has no equity ownership of the VIE, these contractual arrangements permit the shell company 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 shell company, 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 shell company 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.
Geographic Investment Risk, China And Hong Kong-Specific Risk Member  
Prospectus [Line Items]  
Risk [Text Block] China and Hong Kong-Specific Risk. Investments in Chinese issuers subject the Fund to risks specific to China. Investments in the securities of Chinese issuers that trade on an exchange in Hong Kong subject the Fund to risks specific to China and Hong Kong. China and Hong Kong may be subject to considerable degrees of economic, political and social instability. China and Hong Kong are developing markets and demonstrate significantly higher volatility from time to time in comparison to developed markets. Over the past 25 years, the Chinese government has undertaken reform of economic and market practices and is expanding 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. 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. Export growth continues to be a major driver of China’s rapid economic growth. Reduction in spending on Chinese products and services, institution of tariffs or other trade barriers, or a downturn in any of the economies of China’s key trading partners may have an adverse impact on the Chinese economy. China is also vulnerable economically to the impact of a public health crisis, which could depress consumer demand, reduce economic output, and potentially lead to market closures, travel restrictions, and quarantines, all of which would negatively impact China’s economy and could affect the economies of its trading partners. Further, any attempt by China to tighten its control over Hong Kong’s political, economic, legal or social policies may result in an adverse effect on Hong Kong’s markets 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 a shell company in a foreign jurisdiction, such as the Cayman Islands. The shell company 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 shell company has no equity ownership of the VIE, these contractual arrangements permit the shell company 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 shell company, 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 shell company 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.
Humanoid Robotics Companies Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Humanoid Robotics Companies Risk. Companies focused on the development, manufacturing, and supply of technologies essential for humanoid robotics are subject to intense competition, product obsolescence, and the impairment of intellectual property rights; however, they are subject to additional risks that may not be shared by other companies within their industry that provide technologies with more immediate applications to products and services widely available to consumers in the existing marketplace. In particular, humanoid robotic companies face high costs associated with the research and development and significant capital expenditures without any assurance that their products and services will prove to be commercially successful in the future. Further, these companies are particularly sensitive to legal, regulatory and political changes. Questions of societal impact and product safety may lead to government regulation that impedes a humanoid robotic company’s efforts to make its products or services available to the public.
Index Methodology Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Index Methodology Risk. The Index may not include all Chinese Robotics Companies in Hong Kong and/or China, because the Index includes only those companies meeting the Index criteria. For example, companies that would otherwise be included in the Index might be excluded from the Index if they are not one of the top 20 Chinese Robotics Companies based on free float market capitalization.
Index Provider Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Index Provider Risk. There is no assurance that the Index Provider, or any agents that act on its behalf, will compile the Index accurately, or that the Index will be determined, maintained, constructed, reconstituted, rebalanced, composed, calculated or disseminated accurately. The Adviser relies upon the Index Provider and its agents to compile, determine, maintain, construct, reconstitute, rebalance, compose, calculate (or arrange for an agent to calculate), and disseminate the Index accurately. Any losses or costs associated with errors made by the Index Provider or its agents generally will be borne by the Fund and its shareholders.
Issuer-Specific Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Issuer-Specific Risk. Issuer-specific events, including changes in the financial condition of an issuer, can have a negative impact on the value of the Fund.
Market Capitalization Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Market Capitalization Risk.
Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.
Mid-Capitalization Investing Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings.
Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.
Market Capitalization Risk, Large-Capitalization Investing Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Large-Capitalization Investing Risk. The Fund may invest in the securities of large-capitalization companies. The securities of large-capitalization companies may be relatively mature compared to smaller companies and therefore subject to slower growth during times of economic expansion. Large-capitalization companies may also be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes.
Market Capitalization Risk, Mid-Capitalization Investing Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Mid-Capitalization Investing Risk. The Fund may invest in the securities of mid-capitalization companies. The securities of mid-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of large-capitalization companies, but they may also be subject to slower growth than small-capitalization companies during times of economic expansion. The securities of mid-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than large capitalization stocks or the stock market as a whole. Mid-capitalization companies may be particularly sensitive to changes in interest rates, government regulation, borrowing costs, and earnings.
Market Capitalization Risk, Small-Capitalization Investing Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Small-Capitalization Investing Risk. The Fund may invest in the securities of small-capitalization companies. The securities of small-capitalization companies may be more vulnerable to adverse issuer, market, political, or economic developments than securities of larger-capitalization companies. The securities of small-capitalization companies generally trade in lower volumes and are subject to greater and more unpredictable price changes than larger capitalization stocks or the stock market as a whole. Small-capitalization companies also may be particularly sensitive to changes in interest rates, government regulation, borrowing costs and earnings.
New Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] New Fund Risk. The Fund is a recently organized investment company with no operating history. As a result, prospective investors have no track record or history on which to base their investment decision.
Passive Investment Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Passive Investment Risk. The Fund is not actively managed, and its sub-adviser would not sell shares of an equity security due to current or projected underperformance of a security, industry, or sector, unless that security is removed from the Index or the selling of shares of that security is otherwise required upon a reconstitution or rebalancing of the Index in accordance with the Index methodology.
Sector Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Sector Risk. To the extent the Fund invests more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors.
Consumer Cyclical Sector Risk. Investments in the consumer cyclical sector involve risks associated with companies that manufacture products and provide discretionary services directly to the consumer. The risk associated with these companies is closely tied to the performance of the global economy, interest rates, competition, and consumer confidence.
Consumer Vehicle Parts Manufacturing Industry Group Risk. Companies in the Consumer Vehicle Parts Manufacturing Industry Group are subject to risks related to conditions in the automotive and transportation markets. Demand for vehicle parts is influenced by consumer spending levels, vehicle production volumes, replacement cycles, and overall economic conditions. A slowdown in automotive sales, changes in consumer preferences, or reduced vehicle usage may negatively affect revenues and profitability. These companies may be adversely affected by rapid technological change, including the shift toward electric, hybrid, and autonomous vehicles, which may reduce demand for certain traditional vehicle components. Significant investment may be required to adapt to new technologies, and companies that fail to do so may lose competitiveness. The Consumer Vehicle Parts Manufacturing Industry Group is also subject to supply‑chain disruptions, increases in raw material and labor costs, reliance on a limited number of original equipment manufacturer (OEM) customers, and regulatory risks related to safety, emissions, and trade policies. As a result, investments in the Consumer Vehicle Parts Manufacturing Industry Group may be more volatile than investments in more broadly diversified funds.
Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.
Factory Automation Equipment Industry Group Risk. Companies in the Factory Automation Equipment Industry Group are subject to risks related to conditions in industrial production, manufacturing activity, and capital spending cycles. Demand for robotic and automated solutions may decline during economic downturns or periods of reduced business investment, which could negatively affect these companies’ revenues and profitability. These companies face rapid technological change and innovation risk, including advances in robotics, artificial intelligence, machine vision, and software integration. Significant investment may be required to develop or update products, and companies that fail to anticipate or adapt to technological developments may lose competitiveness. The Factory Automation Equipment Industry Group is also subject to supply‑chain disruptions, shortages of key components (such as semiconductors and precision parts), cybersecurity risks related to connected systems, and increased competition and pricing pressure. In addition, changes in trade policies, labor regulations, or workplace safety standards may adversely affect companies operating in the Factory Automation Equipment Industry Group. As a result, the Fund’s investments in the Factory Automation Equipment Industry Group may be more volatile than investments in more broadly diversified funds.
Sector Risk, Consumer Cyclical Sector Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Consumer Cyclical Sector Risk. Investments in the consumer cyclical sector involve risks associated with companies that manufacture products and provide discretionary services directly to the consumer. The risk associated with these companies is closely tied to the performance of the global economy, interest rates, competition, and consumer confidence.
Consumer Vehicle Parts Manufacturing Industry Group Risk. Companies in the Consumer Vehicle Parts Manufacturing Industry Group are subject to risks related to conditions in the automotive and transportation markets. Demand for vehicle parts is influenced by consumer spending levels, vehicle production volumes, replacement cycles, and overall economic conditions. A slowdown in automotive sales, changes in consumer preferences, or reduced vehicle usage may negatively affect revenues and profitability. These companies may be adversely affected by rapid technological change, including the shift toward electric, hybrid, and autonomous vehicles, which may reduce demand for certain traditional vehicle components. Significant investment may be required to adapt to new technologies, and companies that fail to do so may lose competitiveness. The Consumer Vehicle Parts Manufacturing Industry Group is also subject to supply‑chain disruptions, increases in raw material and labor costs, reliance on a limited number of original equipment manufacturer (OEM) customers, and regulatory risks related to safety, emissions, and trade policies. As a result, investments in the Consumer Vehicle Parts Manufacturing Industry Group may be more volatile than investments in more broadly diversified funds.
Sector Risk, Industrials Sector Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Industrials Sector Risk. The industrials sector can be significantly affected by, among other things, worldwide economic growth, supply and demand for specific products and services, rapid technological developments, international political and economic developments, environmental issues, tariffs and trade barriers, and tax and governmental regulatory policies. As the demand for, or prices of, industrials increase, the value of the Fund’s investments generally would be expected to also increase. Conversely, declines in the demand for, or prices of, industrials generally would be expected to contribute to declines in the value of such securities. Such declines may occur quickly and without warning and may negatively impact the value of the Fund and your investment.
Factory Automation Equipment Industry Group Risk. Companies in the Factory Automation Equipment Industry Group are subject to risks related to conditions in industrial production, manufacturing activity, and capital spending cycles. Demand for robotic and automated solutions may decline during economic downturns or periods of reduced business investment, which could negatively affect these companies’ revenues and profitability. These companies face rapid technological change and innovation risk, including advances in robotics, artificial intelligence, machine vision, and software integration. Significant investment may be required to develop or update products, and companies that fail to anticipate or adapt to technological developments may lose competitiveness. The Factory Automation Equipment Industry Group is also subject to supply‑chain disruptions, shortages of key components (such as semiconductors and precision parts), cybersecurity risks related to connected systems, and increased competition and pricing pressure. In addition, changes in trade policies, labor regulations, or workplace safety standards may adversely affect companies operating in the Factory Automation Equipment Industry Group. As a result, the Fund’s investments in the Factory Automation Equipment Industry Group may be more volatile than investments in more broadly diversified funds.
Securities Lending Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Securities Lending Risk. There are certain risks associated with securities lending, including the risk that the borrower may fail to return the securities on a timely basis or even the loss of rights in the collateral deposited by the borrower, if the borrower should fail financially. The Fund could also lose money in the event of a decline in the value of collateral provided for loaned securities or a decline in the value of any investments made with cash collateral. As a result, the Fund may lose money.
Tax Risk Member  
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Risk [Text Block] Tax Risk. To qualify for the favorable tax treatment generally available to regulated investment companies, the Fund must satisfy certain diversification requirements. In particular, the Fund generally may not acquire a security if, as a result of the acquisition, more than 50% of the value of the Fund’s assets would be invested in (a) issuers in which the Fund has, in each case, invested more than 5% of the Fund’s assets or (b) issuers more than 10% of whose outstanding voting securities are owned by the Fund. Given the concentration of the Index in a relatively small number of securities, it may not always be possible for the Fund to fully implement a replication strategy or a representative sampling strategy while satisfying these diversification requirements. The Fund’s efforts to satisfy the diversification requirements may affect the Fund’s execution of its investment strategy and may cause the Fund’s return to deviate from that of the Index, and the Fund’s efforts to replicate or represent the Index may cause it inadvertently to fail to satisfy the diversification requirements. If the Fund were to fail to satisfy the diversification requirements, it could incur penalty taxes and be forced to dispose of certain assets, or it could fail to qualify as a regulated investment company. If the Fund were to fail to qualify as a regulated investment company, 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.
Tracking Error Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Tracking Error Risk. As with all index funds, the performance of the Fund and the Index may differ from each other for a variety of reasons. For example, the Fund incurs operating expenses and portfolio transaction costs not incurred by the Index. In addition, the Fund may not be fully invested in the securities of the Index at all times or may hold securities not included in the Index.
Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] As with any investment, there is a risk that you could lose all or a portion of your investment in the Fund.
Risk Nondiversified Status [Member]  
Prospectus [Line Items]  
Risk [Text Block] Non-Diversification Risk. The Fund is considered to be non-diversified, which means that it may invest more of its assets in the securities of a single issuer or a smaller number of issuers than if it were a diversified fund. As a result, the Fund may be more exposed to the risks associated with and developments affecting an individual issuer or a smaller number of issuers than a fund that invests more widely. This may increase the Fund’s volatility and cause the performance of a relatively smaller number of issuers to have a greater impact on the Fund’s performance. However, the Fund intends to satisfy the diversification requirements for qualifying as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”).