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UVA Unconstrained Medium-Term Fixed Income ETF  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading UVA Unconstrained Medium-Term Fixed Income ETF
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The UVA Unconstrained Medium-Term Fixed Income ETF (the “Fund”) seeks current income with limited risk to principal.
Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Fund
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund (“Shares”). Investors purchasing or selling Shares in the secondary market may be subject to costs (including customary brokerage commissions) charged by their broker. These costs are not included in the expense example below.
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Oct. 31, 2021
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover.
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock
The Fund may pay transaction costs, such as commissions, when it purchases and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, may affect the Fund’s performance. For the fiscal year ended June 30, 2020 , the Fund’s portfolio turnover rate was 21.28 % of the average value of its portfolio.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 21.28%
Expense Exchange Traded Fund Commissions [Text] rr_ExpenseExchangeTradedFundCommissions Investors purchasing or selling Shares in the secondary market may be subject to costs (including customary brokerage commissions) charged by their broker.
Expenses Restated to Reflect Current [Text] rr_ExpensesRestatedToReflectCurrent Restated to reflect current contractual expense cap.
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees “Acquired Fund Fees and Expenses” are the indirect costs of investing in other investment companies. The operating expenses in this fee table will not correlate to the expense ratio in the Fund’s financial statements because the financial statements include only the direct operating expenses incurred by the Fund.
Expense Example [Heading] rr_ExpenseExampleHeading Example.
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock
You may also incur usual and customary brokerage commissions and other charges when buying or selling shares of the Fund, which are not reflected in the example that follows. The Example is intended to help you compare the cost of investing in the Fund with the costs of investing in other funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. The Example includes the Fund’s contractual expense limitation through October 31, 2021 . Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund is an actively managed exchange-traded fund (“ETF”) that seeks to achieve its investment objective of current income by investing principally in fixed income securities of any kind with a dollar-weighted average effective duration of between three and seven years, under normal circumstances. Under normal market conditions, the Fund intends to invest at least 80% of its net assets (plus the amount of borrowings for investment purposes) in such securities. Fixed income securities include bonds, debt securities, and income-producing instruments of any kind issued by governmental or private-sector entities.

The fixed income and other income-producing instruments in which the Fund invests will typically be investment grade (rated BBB or better by either Moody’s Investors Services, Inc. (“Moody’s”) or Standard & Poor’s (“S&P”) and unrated securities considered by the Sub-Adviser to be of comparable credit quality). The Sub-Adviser considers all mortgage-backed securities to be eligible for purchase regardless of their credit rating or lack thereof, and such securities, if present in the Fund, are not considered by the Sub-Adviser to be below investment grade.

The Fund may invest in mortgage-backed securities of any maturity or type, including those guaranteed by, or secured by collateral that is guaranteed by, the United States Government, its agencies, instrumentalities, or sponsored corporations, as well as those of private issuers not subject to any guarantee. Mortgage-backed securities include, among others, government mortgage pass-through securities, collateralized mortgage obligations (“CMOs”), multiclass pass-through securities, and private mortgage pass-through securities. The Fund may also invest in corporate debt obligations, asset-backed securities, foreign securities (corporate and government), inflation-indexed bonds, and preferred securities.

The average maturity or duration of the Fund’s portfolio of fixed income securities will vary based on the Sub-Adviser’s assessment of economic and market conditions, as well as current and anticipated changes in interest rates; however, the Sub-Adviser intends to manage the Fund’s portfolio so that it has a dollar-weighted average effective duration of between three and seven years, under normal circumstances. The Fund may invest in individual securities of any maturity or duration.
Risk [Heading] rr_RiskHeading Principal Risks of Investing in the Fund
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
Risk is inherent in all investing. The loss of your money is a principal risk of investing in the Fund. Investors should consider the following risk factors and special considerations associated with investing in the Fund, which may cause you to lose money. The following principal risk factors have been identified for the Fund. There can be no assurance that the Fund will be successful in meeting its investment objective. See also the sections “Additional Information about the Fund’s Principal Investment Risks” and “Additional Risk Considerations” for additional information about the Fund’s risk factors.

Call/Prepayment Risk. During periods of falling interest rates, an issuer of a callable bond may exercise its right to pay principal on an obligation earlier than expected. This may result in the Fund reinvesting proceeds at lower interest rates, resulting in a decline in the Fund’s income.

Interest Rate Risk . As interest rates rise, the value of fixed income securities held by the Fund are likely to decrease. Securities with longer durations tend to be more sensitive to interest rate changes, making them more volatile than securities with shorter durations. Interest rates in the United States are near historic lows, which may increase the Fund's exposure to risks associated with rising rates. A wide variety of market factors can cause interest rates to rise, including central bank monetary policy (including the Federal Reserve ending its “quantitative easing” policy of purchasing large quantities of securities issued or guaranteed by the U.S. government), rising inflation, and changes in general economic conditions. Interest rate changes can be sudden and unpredictable. Moreover, rising interest rates may lead to decreased liquidity in the bond markets, making it more difficult for the Fund to value or sell some or all of its bond investments at any given time.

Changes in interest rates may also affect the Fund’s share price; for example, a sharp rise in interest rates could cause the Fund’s share price to fall. Securities with longer durations tend to be more sensitive to interest rate changes, making them more volatile than securities with shorter durations. Duration is an estimate of a security’s sensitivity to changes in prevailing interest rates that is based on certain factors that may prove to be incorrect. It is therefore not an exact measurement and may not be able to reliably predict a particular security’s price sensitivity to changes in interest rates.

Fixed Income Risk . When the Fund invests in fixed income securities, the value of your investment in the Fund will fluctuate with changes in interest rates. Typically, a rise in interest rates causes a decline in the value of fixed income securities owned by the Fund. In general, the market price of fixed income securities with longer maturities will increase or decrease more in response to changes in interest rates than shorter-term securities. Other risk factors include credit risk (the debtor may default), extension risk (an issuer may exercise its right to repay principal on a fixed rate obligation held by the Fund later than expected), and prepayment risk (the debtor may pay its obligation early, reducing the amount of interest payments). These risks could affect the value of a particular investment by the Fund, possibly causing the Fund's share price and total return to be reduced and fluctuate more than other types of investments.

Limited History of Operations Risk. The Fund has a limited history of operations. Accordingly, investors in the Fund bear the risk that the Fund may not be successful in implementing its investment strategy, may not employ a successful investment strategy, or may fail to attract sufficient assets under management to realize economies of scale, any of which could result in the Fund being liquidated at any time without shareholder approval and at a time that may not be favorable for all shareholders. Such a liquidation could have negative tax consequences for shareholders and will cause shareholders to incur expenses of liquidation.

New Adviser Risk. The Adviser and Sub-Adviser have only recently begun serving as investment advisers to ETFs, which may limit their effectiveness.

Authorized Participant Risk: Only an authorized participant (“Authorized Participant” or “AP”) may engage in creation or redemption transactions directly with the Fund. The Fund has a limited number of institutions that may act as Authorized Participants on an agency basis (i.e., on behalf of other market participants). Authorized Participant concentration risk may be heightened for exchange-traded funds (ETFs), such as the Fund, that invest in securities issued by non-U.S. issuers or other securities or instruments that have lower trading volumes.

ETF Structure Risks:  The Fund is structured as an ETF and as a result is subject to the special risks, including:

o
Not Individually Redeemable.  Shares are not individually redeemable and may be redeemed by the Fund at NAV only in large blocks known as “Creation Units.”  You may incur brokerage costs purchasing enough Shares to constitute a Creation Unit.

o
Trading Issues.  An active trading market for the Fund’s shares may not be developed or maintained. Trading in Shares on the Exchange may be halted due to market conditions or for reasons that, in the view of the Exchange, make trading in Shares inadvisable, such as extraordinary market volatility.  There can be no assurance that Shares will continue to meet the listing requirements of the Exchange.  If the Fund’s shares are traded outside a collateralized settlement system, the number of financial institutions that can act as authorized participants that can post collateral on an agency basis is limited, which may limit the market for the Fund’s shares.

o
Market Price Variance Risk.  The market prices of Shares will fluctuate in response to changes in NAV and supply and demand for Shares and will include a “bid-ask spread” charged by the exchange specialists, market makers or other participants that trade the particular security.  There may be times when the market price and the NAV vary significantly.  This means that Shares may trade at a discount to NAV.

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In times of market stress, market makers may step away from their role market making in shares of ETFs and in executing trades, which can lead to differences between the market value of Fund shares and the Fund’s net asset value.

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To the extent authorized participants exit the business or are unable to process creations or redemptions and no other AP can step in to do so, there may be a significantly reduced trading market in the Fund’s shares, which can lead to differences between the market value of Fund shares and the Fund’s net asset value.

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The market price for the Fund’s shares may deviate from the Fund’s net asset value, particularly during times of market stress, with the result that investors may pay significantly more or receive significantly less for Fund shares than the Fund’s net asset value, which is reflected in the bid and ask price for Fund shares or in the closing price.

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When all or a portion of an ETFs underlying securities trade in a market that is closed when the market for the Fund’s shares is open, there may be changes from the last quote of the closed market and the quote from the Fund’s domestic trading day, which could lead to differences between the market value of the Fund’s shares and the Fund’s net asset value.

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In stressed market conditions, the market for the Fund’s shares may become less liquid in response to the deteriorating liquidity of the Fund’s portfolio.  This adverse effect on the liquidity of the Fund’s shares may, in turn, lead to differences between the market value of the Fund’s shares and the Fund’s net asset value.

Management Risk. The Fund is subject to management risk because it is an actively managed portfolio. In managing the Fund’s portfolio securities, the Sub-Adviser will apply investment techniques and risk analyses in making investment decisions for the Fund, but there can be no guarantee that these will produce the desired results. The Sub-Adviser’s decisions relating to the Fund’s duration will also affect the Fund’s yield, and in unusual circumstances will affect its share price. To the extent that the Sub-Adviser anticipates interest rates imprecisely, the Fund’s yield at times could lag those of other similarly managed funds.

Preferred Securities Risk. Investing in preferred stock involves the following risks: (i) certain preferred stocks contain provisions that allow an issuer under certain conditions to skip or defer distributions; (ii) preferred stocks may be subject to redemption, including at the issuer’s call, and, in the event of redemption, the Fund may not be able to reinvest the proceeds at comparable or favorable rates of return; (iii) preferred stocks are generally subordinated to bonds and other debt securities in an issuer’s capital structure in terms of priority for corporate income and liquidation payments; and (iv) preferred stocks may trade less frequently and in a more limited volume and may be subject to more abrupt or erratic price movements than many other securities.

Credit/Default Risk . Credit risk is the risk that issuers or guarantors of debt instruments or the counterparty to a derivatives contract, repurchase agreement, or loan of portfolio securities is unable or unwilling to make timely interest and/or principal payments or otherwise honor its obligations. Changes in the financial condition of an issuer or counterparty, changes in specific economic, social or political conditions that affect a particular type of security or other instrument or an issuer, and changes in economic, social, or political conditions generally can increase the risk of default by an issuer or counterparty, which can affect a security’s or other instrument’s credit quality or value and an issuer’s or counterparty’s ability to pay interest and principal when due. Debt instruments are subject to varying degrees of credit risk, which may be reflected in credit ratings. Securities issued by the U.S. government have limited credit risk. Credit rating downgrades and defaults (failure to make interest or principal payment) may potentially reduce the Fund’s income and Share price.

Foreign Securities Risk. Investments in securities of non-U.S. issuers are subject to risks not usually associated with owning securities of U.S. issuers. There is generally less publicly available information about foreign companies, particularly those not subject to the disclosure and reporting requirements of U.S. securities laws. Foreign issuers are generally not bound by uniform accounting, auditing, and financial reporting requirements and standards of practice comparable to those applicable to domestic issuers. Investments in foreign securities also involve the risk of possible adverse changes in investment or exchange control regulations or currency exchange rates, expropriation or confiscatory taxation, limitation on the removal of cash or other assets of the Fund from foreign markets, political or financial instability, or diplomatic and other developments which could affect such investments. Further, economies of particular countries or areas of the world may differ favorably or unfavorably from the economy of the United States. Foreign securities often trade with less frequency and volume than domestic securities and therefore may exhibit greater price volatility.   Investments in foreign markets also involve currency risk, which is the risk that the values of the Fund’s investments denominated in foreign currencies will decrease due to adverse changes in the value of the U.S. dollar relative to the value of foreign currencies.

COVID-19 and Other Infectious Illnesses Risk . An outbreak of infectious respiratory illness caused by a novel coronavirus known as COVID-19 was first detected in China in December 2019 and has now been detected globally. COVID-19 has resulted in travel restrictions, closed international borders, enhanced health screenings at ports of entry and elsewhere, disruption of and delays in healthcare service preparation and delivery, prolonged quarantines, cancellations, supply chain disruptions, and lower consumer demand, as well as general concern and uncertainty. The impact of COVID-19, and other infectious illness outbreaks that may arise in the future, could adversely affect the economies of many countries or the entire global economy, individual issuers and capital markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illnesses in emerging market countries may be greater due to generally less established healthcare systems. Public health crises caused by the COVID-19 outbreak, or other infectious illness outbreaks that may arise in the future, may exacerbate other pre-existing political, social and economic risks in certain countries or globally. As such, issuers of debt securities with operations, productions, offices, and/or personnel in (or other exposure to) areas affected with the virus may experience significant disruptions to their business and/or holdings. The potential impact on the credit markets may include market illiquidity, defaults and bankruptcies, among other consequences, particularly on issuers in the airline, travel and leisure and retail sectors.  The extent to which COVID-19 or other infectious illnesses will affect the Fund, the Fund’s service providers’ and/or issuer’s operations and results will depend on future developments, which are highly uncertain and cannot be predicted, including new information that may emerge concerning the severity of COVID-19 or other infectious illnesses and the actions taken to contain COVID-19 or other infectious illnesses. Economies and financial markets throughout the world are becoming increasingly interconnected. As a result, whether or not the Fund invests in securities of issuers located in or with significant exposure to countries experiencing economic, political and/or financial difficulties, the value and liquidity of the Fund’s investments may be negatively affected by such events. If there is a significant decline in the value of the Fund’s portfolio, this may impact the Fund’s asset coverage levels for certain kinds of derivatives and other portfolio transactions. The duration of the COVID-19 outbreak, or any other infectious illness outbreak that may arise in the future, and its impact on the global economy cannot be determined with certainty.

Early Close/Trading Halt Risk : An exchange or market may close or issue trading halts on specific securities, or the ability to buy or sell certain securities or financial instruments may be restricted, which may prevent the Fund from buying or selling certain securities or financial instruments. In these circumstances, the Fund may be unable to rebalance its portfolio, may be unable to accurately price its investments and may incur. Cybersecurity Risk.   As part of its business, the Advisor processes, stores, and transmits large amounts of electronic information, including information relating to the transactions of the Fund. The Advisor and the Fund are therefore susceptible to cybersecurity risk. Cybersecurity failures or breaches of the Fund or its service providers have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, and/or reputational damage. The Fund and its shareholders could be negatively impacted as a result.

Inflation-Indexed Bond Risk . Inflation-indexed bonds may change in value in response to actual or anticipated changes in inflation rates in a manner unanticipated by the Fund’s portfolio management team or investors generally. Inflation-indexed bonds are subject to debt securities risks.

Mortgage- and Asset-Backed Securities Risk. In addition to other risks commonly associated with investing in debt securities, mortgage-backed securities (“MBS”) are subject to “prepayment risk” and “extension risk.” Prepayment risk is the risk that, when interest rates fall, certain types of obligations will be paid off by the obligor more quickly than originally anticipated, and the Fund may have to invest the proceeds in securities with lower yields. MBS are priced with an expectation of some anticipated level of prepayment of principal. Extension risk is the risk that, 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. MBS are also subject to the risk of default on the underlying mortgages, particularly during periods of economic downturn. Reduced investor demand for mortgage loans and mortgage- related securities may adversely affect the liquidity and market value of MBS. The risks associated with investing in asset-backed securities (“ABS”) are similar to those associated with investing in MBS. ABS also entail certain risks not presented by MBS, including the risk that in certain states it may be difficult to perfect the liens securing the collateral backing certain ABS. In addition, certain ABS are based on loans that are unsecured, which means that there is no collateral to seize if the underlying borrower defaults.

U.S. Government Securities Risk. Debt securities issued or guaranteed by certain U.S. Government agencies, instrumentalities, and sponsored enterprises are not supported by the full faith and credit of the U.S. Government, so investments in their securities or obligations issued by them involve credit risk greater than investments in other types of U.S. Government securities.
Risk Lose Money [Text] rr_RiskLoseMoney The loss of your money is a principal risk of investing in the Fund. Investors should consider the following risk factors and special considerations associated with investing in the Fund, which may cause you to lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Fund Performance
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The following bar chart and tables provide an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the average annual total returns compared to that of a broad-based securities market index. The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future. Updated performance information on the Fund’s results can be obtained by visiting http://www.ncfunds.com/fundpages/426.htm.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following bar chart and tables provide an indication of the risks of investing in the Fund by showing changes in the Fund’s performance from year to year and by showing how the average annual total returns compared to that of a broad-based securities market index.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress http://www.ncfunds.com/fundpages/426.htm
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Fund’s past performance is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Calendar Year Returns
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
During the periods shown in the bar chart above, the Fund’s highest quarterly return was 3.80 % (quarter ended March 31, 2019 ) and the Fund’s lowest quarterly return was - 0.94 % (quarter ended March 31, 2018). The year-to-date return for the most recent quarter ended September 30, 2020 was 5.26 %
Year to Date Return, Label rr_YearToDateReturnLabel year-to-date return for the most recent quarter
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2020
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 5.26%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest quarterly return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 3.80%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest quarterly return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Mar. 31, 2018
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.94%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deductions for fees and expenses)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on an investor’s tax situation and may differ from those shown and are not applicable to investors who hold Fund shares through tax-deferred arrangements such as a 401(k) plan or an individual retirement account (IRA).
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown for only one class of shares and after-tax returns will vary for other classes.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock
After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor’s tax situation and may differ from those shown and are not applicable to investors who hold Fund shares through tax-deferred arrangements such as a 401(k) plan or an individual retirement account (IRA). After-tax returns are shown for only one class of shares and after-tax returns will vary for other classes.
Average Annual Return, Caption rr_AverageAnnualReturnCaption Average Annual Total Returns Period Ended December 31, 2019
UVA Unconstrained Medium-Term Fixed Income ETF | Barclays US Aggregate Total Return Value Unhedged USD Index (reflects no deductions for fees and expenses)  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.72%
Since Inception rr_AverageAnnualReturnSinceInception 3.73% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 18, 2017
UVA Unconstrained Medium-Term Fixed Income ETF | UVA Unconstrained Medium-Term Fixed Income ETF  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.48%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.03% [2]
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.76%
Fee Waiver and/or Expense Limitation rr_FeeWaiverOrReimbursementOverAssets (0.23%) [3],[4]
Net Annual Fund Operating Expenses rr_NetExpensesOverAssets 0.53% [3]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 54
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 220
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 400
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 921
Annual Return 2018 rr_AnnualReturn2018 (2.99%)
Annual Return 2019 rr_AnnualReturn2019 9.46%
1 Year rr_AverageAnnualReturnYear01 9.46%
Since Inception rr_AverageAnnualReturnSinceInception 3.62% [1]
Inception Date rr_AverageAnnualReturnInceptionDate Aug. 18, 2017
UVA Unconstrained Medium-Term Fixed Income ETF | UVA Unconstrained Medium-Term Fixed Income ETF | After Taxes on Distributions  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 8.07%
Since Inception rr_AverageAnnualReturnSinceInception 2.45% [1]
UVA Unconstrained Medium-Term Fixed Income ETF | UVA Unconstrained Medium-Term Fixed Income ETF | After Taxes on Distributions and Sale of Fund Shares  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 5.33%
Since Inception rr_AverageAnnualReturnSinceInception 2.26% [1]
[1] The Fund commenced operations on August 18, 2017.
[2] “Acquired Fund Fees and Expenses” are the indirect costs of investing in other investment companies. The operating expenses in this fee table will not correlate to the expense ratio in the Fund’s financial statements because the financial statements include only the direct operating expenses incurred by the Fund.
[3] Restated to reflect current contractual expense cap.
[4] Universal Value Advisers (the “Sub-Adviser”) has entered into an expense limitation agreement with the Fund under which it has agreed to waive or reduce its fees and to assume other expenses of the Fund, if necessary, in an amount that limits the Fund’s annual operating expenses (exclusive of (i) any front-end or contingent deferred loads; (ii) brokerage fees and commissions, (iii) acquired fund fees and expenses; (iv) fees and expenses associated with investments in other collective investment vehicles or derivative instruments (including for example option and swap fees and expenses); (v) borrowing costs (such as interest and dividend expense on securities sold short); (vi) taxes; and (vii) extraordinary expenses, such as litigation expenses (which may include indemnification of Fund officers and Trustees and contractual indemnification of Fund service providers (other than the Adviser or Sub-Adviser) to not more than 0.50% of the average daily net assets of the Fund through October 31, 2021 , and may be terminated by the Board of Trustees at any time. The Sub-Adviser cannot recoup from the Fund any amounts paid by the Sub-Adviser under the expense limitation agreement. Further, net annual operating expenses for the Fund may exceed those contemplated by the waiver due to expenses that are not waived under the expense limitation agreement.