Investment Risks |
Sep. 28, 2026 |
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| ClearShares OCIO ETF | Agency Debt Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Agency Debt Risk. The Fund invests in unsecured bonds or debentures issued by U.S. government agencies. Bonds or debentures issued by U.S. government agencies, government-sponsored entities, or government corporations, including, among others, Fannie Mae and Freddie Mac, are generally backed only by the general creditworthiness and reputation of the U.S. government agency, government-sponsored entity, or government corporation issuing the bond or debenture and are not guaranteed by the U.S. Treasury or backed by the full faith and credit of the U.S. government. Ginnie Mae securities are generally backed by the full faith and credit of the U.S. government. Some U.S. government agencies, including Fannie Mae and Freddie Mac, purchase and guarantee residential mortgages and form MBS that they issue to the market. These agencies also hold their own MBS as well as those of other institutions with funding from the agency debentures they issue. The market for MBS has been adversely affected by the value of those MBS held and/or issued by these agencies. These securities are subject to more credit risk than U.S. government securities that are supported by the full faith and credit of the U.S. (e.g., U.S. Treasury bonds). If a U.S. government agency that is the issuer of securities in which the Fund invests is unable to meet its obligations or ceases to exist and no plan is made for repayment of securities, the performance of the Fund will be adversely impacted.
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| ClearShares OCIO ETF | Asset Allocation Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Asset Allocation Risk. The Fund may favor an asset category or investment strategy that performs poorly relative to other asset categories and investment strategies for short or long periods of time. |
| ClearShares OCIO ETF | Covered Call Options Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Covered Call Options Risk. Investments in covered calls involve certain risks. When writing a covered call option, the Fund creates an obligation to deliver a security it already owns at an agreed-upon strike price on or before a predetermined date in the future in return for a premium. By selling a covered call option, the Fund may forego the opportunity to benefit from an increase in the price of the underlying stock above the strike price while continuing to bear the risk of a decline in the value of the underlying stock. |
| ClearShares OCIO ETF | Currency Exchange Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Currency Exchange Rate Risk. The Fund may invest in Underlying Investments that invest primarily in securities denominated in non-U.S. currencies. Changes in currency exchange rates and the relative value of non-U.S. currencies may affect the value of such investments 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. |
| ClearShares OCIO ETF | Emerging Markets Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Emerging Markets Risk. The Fund’s Underlying Investments that provide exposure to securities traded in developing or emerging markets, and individual securities with such exposure, may involve substantial risk with respect to such securities due to limited information; different accounting, auditing, and financial reporting standards; a country’s dependence on revenue from particular commodities or international aid; and expropriation, nationalization, or other adverse political or economic developments. Political and economic structures in many emerging market countries may be undergoing significant evolution and rapid development, and such countries may lack the social, political and economic stability characteristics of more developed countries. Some of these countries may have failed to recognize private property rights in the past and, at times, have nationalized or expropriated the assets of private companies. |
| ClearShares OCIO ETF | Equity Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Equity Market Risk. The Fund may invest directly or in Underlying Investments that invest primarily in common stocks. 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 specific issuers. Equity securities 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 industries, sectors or companies in which the Fund or its Underlying Investment invest. In addition, local, regional or global events such as war, including Russia’s invasion of Ukraine, acts of terrorism, 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. |
| ClearShares OCIO ETF | 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. ◦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. 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. ◦Trading. Although Shares are listed for trading on NYSE Arca, Inc. (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.
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| ClearShares OCIO ETF | 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. |
| ClearShares OCIO ETF | 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. |
| ClearShares OCIO ETF | 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. 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. |
| ClearShares OCIO ETF | ETF Risks, Trading Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Trading. Although Shares are listed for trading on NYSE Arca, Inc. (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. |
| ClearShares OCIO ETF | Fixed Income Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fixed Income Securities Risk. The Fund may invest in Underlying Investments that invest primarily in fixed income securities. Fixed income securities, such as bonds and certain asset-backed securities, involve certain risks, which include: ◦Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. ◦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. ◦Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. ◦Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. ◦Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. ◦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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. ◦Maturity Risk. The value of 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. ◦Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated, and the proceeds may have to be invested in securities with lower yields. ◦Variable and Floating Rate Instrument Risk. Floating or variable rate securities pay interest at rates that adjust in response to changes in a specified interest rate or reset at predetermined dates (such as the end of a calendar quarter). Securities with floating or variable interest rates are generally less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as comparable market interest rates. Although floating or variable rate securities are generally less sensitive to interest rate risk than fixed rate securities, they are subject to credit, liquidity and default risk and may be subject to legal or contractual restrictions on resale, which could impair their value.
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| ClearShares OCIO ETF | Fixed Income Securities Risk, Call Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Duration Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Event Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Maturity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Maturity Risk. The value of 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. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated, and the proceeds may have to be invested in securities with lower yields. |
| ClearShares OCIO ETF | Fixed Income Securities Risk, Variable And Floating Rate Instrument Risk Member | |
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| Risk [Text Block] | Variable and Floating Rate Instrument Risk. Floating or variable rate securities pay interest at rates that adjust in response to changes in a specified interest rate or reset at predetermined dates (such as the end of a calendar quarter). Securities with floating or variable interest rates are generally less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as comparable market interest rates. Although floating or variable rate securities are generally less sensitive to interest rate risk than fixed rate securities, they are subject to credit, liquidity and default risk and may be subject to legal or contractual restrictions on resale, which could impair their value.
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| ClearShares OCIO ETF | Foreign Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Foreign Securities Risk. The Fund may invest in Underlying Investments that invest primarily in foreign securities. Investments in foreign securities involve certain risks that may not be present with investments in U.S. securities. For example, investments in foreign securities may be subject to risk of loss due to foreign currency fluctuations, the imposition of tariffs, or to political or economic instability. Investments in foreign 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. These risks may be enhanced for securities of companies organized in emerging market nations. |
| ClearShares OCIO ETF | Government Obligations Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Government Obligations Risk. The Fund may invest in Underlying Investments that primarily invest in securities issued by the U.S. or other governments. There can be no guarantee that the United States or another country will be able to meet its payment obligations with respect to such securities. 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. |
| ClearShares OCIO ETF | High-Yield Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | High-Yield Securities Risk. The Fund may invest in Underlying Investments that primarily invest in high-yield securities (also known as “junk bonds”). Although high-yield securities generally pay higher rates of interest than investment grade bonds, high-yield securities are speculative, high risk investments that may cause income and principal losses for the Fund or its Underlying Investments and, consequently, negatively affect the value of the Fund. High-yield securities may be issued by companies that are restructuring, are smaller and less creditworthy, or are more highly indebted than other companies. This means that they may have more difficulty making scheduled payments of principal and interest. Changes in the value of high-yield securities are influenced more by changes in the financial and business position of the issuing company than by changes in interest rates when compared to investment grade securities. The Fund’s exposure to high-yield securities may subject it to a substantial degree of credit risk. |
| ClearShares OCIO ETF | Investment Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Company Risk. The risks of investing in investment companies, such as the Underlying Investments, typically reflect the risks of the types of instruments in which the investment companies invest. By investing in another investment company, the Fund becomes a shareholder of that investment company and bears its proportionate share of the fees and expenses of the other investment company. The Fund may be subject to statutory limits with respect to the amount it can invest in other ETFs, which may adversely affect the Fund’s ability to achieve its investment objective. Investments in ETFs are also subject to the “ETF Risks” described above. |
| ClearShares OCIO 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 portfolio managers’ success or failure to implement investment strategies for the Fund. |
| ClearShares OCIO ETF | Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The trading prices of Underlying Investments, including equity and debt securities and other instruments, fluctuate in response to a variety of factors. These factors include events impacting the entire market or specific market segments, such as political, market and economic developments, as well as events that impact specific issuers. A Fund’s NAV and market price, like security and commodity prices generally, may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. |
| ClearShares OCIO ETF | MLP Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | MLP Risk. The Fund may invest in Underlying Investments that principally invest in MLPs. MLP investment returns are enhanced during periods of declining or low interest rates and tend to be negatively influenced when interest rates are rising. In addition, most MLPs are fairly leveraged and typically carry a portion of a “floating” rate debt. As such, a significant upward swing in interest rates would also drive interest expense higher. Furthermore, most MLPs grow by acquisitions partly financed by debt, and higher interest rates could make it more difficult to make acquisitions. MLP investments also entail many of the general tax risks of investing in a partnership. Limited partners in an MLP typically have limited control and limited rights to vote on matters affecting the partnership. Additionally, there is always the risk that an MLP will fail to qualify for favorable tax treatment. |
| ClearShares OCIO ETF | Mortgage- And Asset-Backed Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mortgage- and Asset-Backed Securities Risk. The Fund may invest in Underlying Investments that principally invest in mortgage- and asset-backed securities. Such securities are subject to credit, interest rate, prepayment, and extension risks (see “Fixed Income Securities Risk” above). These securities also are subject to risk of default on the underlying mortgage or asset, particularly during periods of economic downturn. Small movements in interest rates may quickly and significantly reduce the value of certain mortgage-backed securities. |
| ClearShares OCIO ETF | Municipal Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Securities Risk. Municipal securities can be significantly affected by political or economic changes, including changes made in the law after issuance of the securities, as well as uncertainties in the municipal market related to taxation, legislative changes or the rights of municipal security holders, including in connection with an issuer insolvency. Municipal securities backed by current or anticipated revenues from a specific project or specific assets can be negatively affected by the inability to collect revenues from the project or the assets. |
| ClearShares OCIO ETF | REIT Investment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | REIT Investment Risk. The Fund may invest in Underlying Investments that primarily invest in REITs. Investments in REITs involve unique risks. REITs may have limited financial resources, may trade less frequently and in limited volume, and may be more volatile than other securities. The risks of investing in REITs include certain risks associated with the direct ownership of real estate and the real estate industry in general. REITs are also subject to heavy cash flow dependency, defaults by borrowers, and self-liquidation. |
| ClearShares OCIO ETF | Sector Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Risk. To the extent the Fund invests, either directly or through Underlying Investments, more heavily in particular sectors of the economy, its performance will be especially sensitive to developments that significantly affect those sectors. |
| ClearShares OCIO ETF | 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. |
| ClearShares OCIO ETF | Small And Mid-Sized Company Stock Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Small and Mid-Sized Company Stock Risk. The Fund may invest directly or in Underlying Investments that primarily invest in the common stock of small- or mid-sized companies. Small to mid-sized company stocks have historically been subject to greater investment risk than large company stocks. The prices of small- to mid-sized company stocks tend to be more volatile and less liquid than large company stocks. |
| ClearShares OCIO ETF | Risk Lose Money [Member] | |
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| 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. |
| ClearShares Ultra-Short Maturity ETF | Agency Debt Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Agency Debt Risk. The Fund invests in unsecured bonds or debentures issued by U.S. government agencies, including Fannie Mae and Freddie Mac. Bonds or debentures issued by U.S. government agencies, government-sponsored entities, or government corporations, including, among others, Fannie Mae and Freddie Mac, are generally backed only by the general creditworthiness and reputation of the U.S. government agency, government-sponsored entity, or government corporation issuing the bond or debenture and are not guaranteed by the U.S. Department of the Treasury (“U.S. Treasury”) or backed by the full faith and credit of the U.S. government. As a result, there is uncertainty as to the current status of many obligations of Fannie Mae, Freddie Mac and other agencies that are placed under conservatorship of the federal government. Ginnie Mae securities are generally backed by the full faith and credit of the U.S. government. |
| ClearShares Ultra-Short Maturity ETF | 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. In addition, cash redemptions may incur higher brokerage costs than in-kind redemptions, and these added costs may be borne by the Fund and negatively impact Fund performance. ◦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 NYSE Arca, Inc. (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.
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| ClearShares Ultra-Short Maturity ETF | 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. |
| ClearShares Ultra-Short Maturity ETF | ETF Risks, Costs Of Buying Or Selling Shares Risk Member | |
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| 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. |
| ClearShares Ultra-Short Maturity ETF | ETF Risks, Shares May Trade At Prices Other Than NAV Risk Member | |
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| 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. |
| ClearShares Ultra-Short Maturity ETF | ETF Risks, Trading Risk Member | |
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| Risk [Text Block] | Trading. Although Shares are listed for trading on NYSE Arca, Inc. (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. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | •Fixed Income Securities Risk. The Fund may invest in fixed income securities. Fixed income securities, such as bonds and certain asset-backed securities, involve certain risks, which include: ◦Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. ◦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. ◦Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. ◦Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. ◦Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. ◦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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. ◦Maturity Risk. The value of 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. ◦Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated, and the proceeds may have to be invested in securities with lower yields.
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| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Call Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Duration Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Event Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Maturity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Maturity Risk. The value of 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. |
| ClearShares Ultra-Short Maturity ETF | Fixed Income Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated, and the proceeds may have to be invested in securities with lower yields. |
| ClearShares Ultra-Short Maturity ETF | Government Obligations Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Government Obligations Risk. The Fund invests in securities issued, sponsored, or guaranteed by the U.S. government, its agencies or instrumentalities. There can be no guarantee that the United States will be able to meet its payment obligations with respect to such securities where 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. |
| ClearShares Ultra-Short Maturity 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 portfolio managers’ success or failure to implement investment strategies for the Fund. |
| ClearShares Ultra-Short Maturity ETF | Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The trading prices of debt securities and other instruments fluctuate in response to a variety of factors. The Fund’s NAV and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. |
| ClearShares Ultra-Short Maturity ETF | 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. In addition, cash redemptions may incur higher brokerage costs than in-kind redemptions, and these added costs may be borne by the Fund and negatively impact Fund performance. |
| ClearShares Ultra-Short Maturity ETF | Illiquid Investments Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Illiquid Investments Risks. The Fund may invest in repurchase agreements that are deemed illiquid because they cannot be expected to be sold or disposed of in current market conditions, within seven calendar days, without significantly impacting the market value of the investment. The Fund could lose money if it is unable to dispose of such investments at a time or price that is most beneficial to the Fund. |
| ClearShares Ultra-Short Maturity ETF | Mortgage-Backed Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mortgage-Backed Securities Risk. The Fund invests in MBS issued or guaranteed by the U.S. government. Such securities are subject to credit, interest rate, prepayment, and extension risks (see “Fixed Income Securities Risk” above). These securities also are subject to risk of default on the underlying mortgage or asset, particularly during periods of economic downturn. Small movements in interest rates may quickly and significantly reduce the value of certain MBS. |
| ClearShares Ultra-Short Maturity ETF | Repurchase Agreement Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Repurchase Agreement Risk. Repurchase agreements may be construed to be collateralized loans by the Fund, and if so, the underlying securities relating to the repurchase agreement will only constitute collateral for the seller’s obligation to pay the repurchase price. If the seller defaults on its obligation under the agreement, the Fund may suffer delays and incur costs or lose money in exercising its rights under the agreement. A seller failing to repurchase the security coupled with a decline in the market value of the security may result in the Fund losing money. |
| ClearShares Ultra-Short Maturity ETF | 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. |
| ClearShares Piton Intermediate Fixed Income ETF | 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. In addition, cash redemptions may incur higher brokerage costs than in-kind redemptions, and these added costs may be borne by the Fund and negatively impact Fund performance. ◦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 NYSE Arca, Inc. (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. 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.
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| ClearShares Piton Intermediate Fixed Income ETF | 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. |
| ClearShares Piton Intermediate Fixed Income ETF | 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. |
| ClearShares Piton Intermediate Fixed Income ETF | 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. |
| ClearShares Piton Intermediate Fixed Income ETF | ETF Risks, Trading Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Trading. Although Shares are listed for trading on NYSE Arca, Inc. (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. 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. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Fixed Income Securities Risk. The value of investments in fixed income securities fluctuates with changes in interest rates. Typically, a rise in interest rates causes a decline in the value of fixed income securities owned indirectly by the Fund. On the other hand, if rates fall, the value of the fixed income securities generally increases. The Fund may be subject to a greater risk of rising interest rates and the effect of potential government fiscal policy initiatives and resulting market reaction to those initiatives. Below are several specific risks associated with investments in fixed income securities. ◦Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. ◦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. ◦Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. ◦Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. ◦Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. ◦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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. ◦Maturity Risk. The value of 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. ◦Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated and the proceeds may have to be invested in securities with lower yields. ◦Variable and Floating Rate Instrument Risk. Floating or variable rate securities pay interest at rates that adjust in response to changes in a specified interest rate or reset at predetermined dates (such as the end of a calendar quarter). Securities with floating or variable interest rates are generally less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as comparable market interest rates. Although floating or variable rate securities are generally less sensitive to interest rate risk than fixed rate securities, they are subject to credit, liquidity and default risk and may be subject to legal or contractual restrictions on resale, which could impair their value.
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| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Call Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Call Risk. During periods of falling interest rates, an issuer of a callable bond held by the Fund may “call” or repay the security prior to its stated maturity, and the Fund may have to reinvest the proceeds at lower interest rates, resulting in a decline in the Fund’s income. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Credit Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Duration Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Duration Risk. Prices of fixed income securities with longer durations are more sensitive to interest rate changes than those with shorter durations. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Event Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Event Risk. Event risk is the risk that corporate issuers may undergo restructurings, such as mergers, leveraged buyouts, takeovers, or similar events financed by increased debt. As a result of the added debt, the credit quality and market value of a company’s bonds and/or other debt securities may decline significantly. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Extension Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Extension Risk. When interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Interest Rate Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | 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 government policy may have adverse effects on investments, volatility, and illiquidity in debt markets. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Maturity Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Maturity Risk. The value of 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. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Prepayment Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Prepayment Risk. When interest rates fall, certain obligations will be paid off by the obligor more quickly than originally anticipated and the proceeds may have to be invested in securities with lower yields. |
| ClearShares Piton Intermediate Fixed Income ETF | Fixed Income Securities Risk, Variable And Floating Rate Instrument Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | ◦Variable and Floating Rate Instrument Risk. Floating or variable rate securities pay interest at rates that adjust in response to changes in a specified interest rate or reset at predetermined dates (such as the end of a calendar quarter). Securities with floating or variable interest rates are generally less sensitive to interest rate changes than securities with fixed interest rates, but may decline in value if their interest rates do not rise as much, or as quickly, as comparable market interest rates. Although floating or variable rate securities are generally less sensitive to interest rate risk than fixed rate securities, they are subject to credit, liquidity and default risk and may be subject to legal or contractual restrictions on resale, which could impair their value.
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| ClearShares Piton Intermediate Fixed Income ETF | Government Obligations Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Government Obligations Risk. The Fund may invest in securities issued by the U.S. government or its agencies or instrumentalities. There can be no guarantee that the United States will be able to meet its payment obligations with respect to such securities. Further, not all obligations issued by a U.S. government-related entity are backed by the full faith and credit of the U.S. government. 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. |
| ClearShares Piton Intermediate Fixed Income ETF | Investment Company Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Investment Company Risk. The risks of investing in investment companies typically reflect the risks of the types of instruments in which the investment companies invest. By investing in another investment company, the Fund becomes a shareholder of that investment company and bears its proportionate share of the fees and expenses of the other investment company. Investments in ETFs are also subject to the “ETF Risks” described above. |
| ClearShares Piton Intermediate Fixed Income 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. |
| ClearShares Piton Intermediate Fixed Income ETF | Market Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Market Risk. The trading prices of debt securities and other instruments fluctuate in response to a variety of factors. The Fund’s NAV and market price may fluctuate significantly in response to these and other factors. As a result, an investor could lose money over short or long periods of time. |
| ClearShares Piton Intermediate Fixed Income ETF | Mortgage- And Asset-Backed Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Mortgage- and Asset-Backed Securities Risk. The Fund may invest in U.S. government agency-backed mortgage- and asset-backed securities. Mortgage- and asset-backed securities are subject to interest rate risk. Modest movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain types of these securities. When interest rates fall, mortgage- and asset-backed securities may be subject to prepayment risk. When interest rates rise, certain types of mortgage- and asset-backed securities are subject to extension risk. Mortgage- and asset-backed securities can also be subject to the risk of default on the underlying residential or commercial mortgage(s) or other assets. |
| ClearShares Piton Intermediate Fixed Income ETF | Municipal Securities Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Municipal Securities Risk. Municipal securities can be significantly affected by political or economic changes, including changes made in the law after issuance of the securities, as well as uncertainties in the municipal market related to taxation, legislative changes or the rights of municipal security holders, including in connection with an issuer insolvency. Municipal securities backed by current or anticipated revenues from a specific project or specific assets can be negatively affected by the inability to collect revenues from the project or the assets. |
| ClearShares Piton Intermediate Fixed Income ETF | Sector Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Sector Risk. At times the Fund may increase the relative emphasis of its investments in a particular group of industries or sectors. The prices of securities of issuers in a particular sector may be more susceptible to fluctuations due to changes in economic or business conditions, government regulations, availability of basic resources or supplies, or other events that affect that industry or sector more than securities of issuers in other industries and sectors. To the extent that the Fund increases the relative emphasis of its investments in a particular industry or sector, the value of Shares may fluctuate in response to events affecting that industry or sector. |
| ClearShares Piton Intermediate Fixed Income ETF | 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. In addition, cash redemptions may incur higher brokerage costs than in-kind redemptions, and these added costs may be borne by the Fund and negatively impact Fund performance. |
| ClearShares Piton Intermediate Fixed Income ETF | Rating Agencies Risks Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Rating Agencies Risks. Ratings are not an absolute standard of quality. Ratings are general indicators that reflect only the view of the originating rating agencies from which an explanation of the significance of such ratings may be obtained. There is no assurance that a particular rating will continue for any given period of time or that any such rating will not be revised downward or withdrawn entirely. Such changes may negatively affect the liquidity or market price of the securities in which the Fund invests. The ratings of securitized assets may not adequately reflect the credit risk of those assets due to their structure. |
| ClearShares Piton Intermediate Fixed Income ETF | Valuation Risk Member | |
| Prospectus [Line Items] | |
| Risk [Text Block] | Valuation Risk. The prices provided by the Fund’s pricing services or independent dealers or the fair value determinations made by the Adviser may be different from the prices used by other investment companies or from the prices at which debt obligations are actually bought and sold. The prices of certain debt obligations provided by pricing services may be subject to frequent and significant change, and will vary depending on the information that is available. |
| ClearShares Piton Intermediate Fixed Income ETF | 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. |