Label	Element	Value
O'Shaughnessy Market Leaders Value Fund
Prospectus [Line Items]	rr_ProspectusLineItems
Risk/Return [Heading]	rr_RiskReturnHeading	O’Shaughnessy Market Leaders Value Fund
Objective [Heading]	rr_ObjectiveHeading	Investment Objective
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	The O’Shaughnessy Market Leaders Value Fund’s (the “Fund”) investment objective is to seek long-term capital appreciation and current income.
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, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Class I shares, which are not reflected in the tables or examples below.
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio Turnover
Portfolio Turnover [Text Block]	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 63.50% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	63.50%
Expense Example [Heading]	rr_ExpenseExampleHeading	Example
Expense Example Narrative [Text Block]	rr_ExpenseExampleNarrativeTextBlock	This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual 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.
Expense Example by, Year, Caption [Text]	rr_ExpenseExampleByYearCaption	Although your actual costs may be higher or lower, based on these assumptions, your costs would be:
Strategy [Heading]	rr_StrategyHeading	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	Under normal market conditions, the Fund invests primarily in a diversified portfolio of common stocks and other equity securities of companies of all sizes, including but not limited to, American Depositary Receipts (“ADRs”), preferred stocks, limited partnerships, and convertible securities. O’Shaughnessy Asset Management, LLC (the “Adviser”) employs a bottom-up, quantitative, factor-based approach to security selection based on research and analysis of historical data. The Adviser may eliminate or substitute factors at its discretion. Portfolio securities may be sold generally upon periodic rebalancing of the Fund’s portfolio. For selling decisions, the Adviser considers the same factors it uses in evaluating a security for purchase and generally sells securities when it believes such securities no longer meet its investment criteria. The Fund may from time to time emphasize investment in certain sectors of the market. The Adviser screens securities using a factor-based model that seeks to identify market leading companies by analysis of a number of factors including, but not limited to, low valuations, strong financial strength, conservative earnings reporting (earnings quality), strong earnings growth, market capitalization and volume. The Fund selects companies that offer a strong “shareholder yield” – the combination of dividend yield and the rate at which the company is buying back shares of its stock – at the time of initial purchase. While stocks often have both a strong dividend yield and a high rate of share repurchases, that may not always be the case. An individual stock may be deemed to be attractive even if its entire shareholder yield is generated from either dividends or share repurchases. Due to ongoing research, the Adviser may modify the characteristics utilized in the investment strategy, without prior notice to shareholders, in order to better achieve the investment objective. The Fund will primarily invest in common stocks of U.S. issuers but may also invest up to 20% of its total assets in common stocks of foreign securities and issuers, which may also include issuers located in emerging markets and frontier markets, also known as “pre-emerging markets,” as defined by countries listed on the Morgan Stanley Capital International (“MSCI”) Emerging Markets Index and/or the MSCI Frontier Markets Index. The Fund may invest up to 25% of its total assets in real estate investment trusts (“REITs”) or foreign real estate companies. The Fund may also invest up to 20% of its total assets in depositary receipts of foreign based companies (i.e., ADRs, European Depositary Receipts (“EDRs”), and Global Depositary Receipts (“GDRs”), etc.) whose common stock is not itself listed on a U.S. exchange. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by the issuer of the underlying security and a depositary, whereas a depositary may establish an unsponsored facility without participation by the issuer of the depositary security. The Fund may invest up to 10% of its total assets in other investment companies, including exchange-traded funds (“ETFs”). The Fund may also invest up to 100% of the Fund’s total assets in cash, cash equivalents, and high-quality, short-term debt securities, money market mutual funds and money market instruments for temporary defensive purposes. The Fund may also invest up to 50% of its total assets in ETFs that are aligned with the Fund’s principal investment strategies, for temporary defensive purposes.
Risk [Heading]	rr_RiskHeading	Principal Risks of Investing in the Fund
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	Performance
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The following information provides some indication of the risks of investing in the Fund. The bar chart shows the annual return for the Fund’s Class I shares from year to year. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available on the Fund’s website at www.osfunds.com or by calling the Fund toll-free at 1-877-291-7827.
Performance Information Illustrates Variability of Returns [Text]	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following information provides some indication of the risks of investing in the Fund.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	1-877-291-7827
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	www.osfunds.com
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Calendar Year Total Return as of December 31 – Class I
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	The Fund’s calendar year-to-date return as of September 30, 2023 was 6.23%. During the period of time shown in the bar chart, the Fund’s highest quarterly return was 20.85% for the quarter ended December 31, 2020 and the lowest quarterly return was -30.77% for the quarter ended March 31, 2020.
Year to Date Return, Label	rr_YearToDateReturnLabel	year-to-date return
Bar Chart, Year to Date Return, Date	rr_BarChartYearToDateReturnDate	Sep. 30, 2023
Bar Chart, Year to Date Return	rr_BarChartYearToDateReturn	6.23%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest quarterly return
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Dec. 31, 2020
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	20.85%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest quarterly return
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Mar. 31, 2020
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(30.77%)
Performance Table Heading	rr_PerformanceTableHeading	Average Annual Total Returns (for the period ended December 31, 2022)
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax returns were 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 after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).
Performance Table Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	The after-tax returns were 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 after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”). The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.
O'Shaughnessy Market Leaders Value Fund \| Russell 1000 Value® Index (reflects no deduction for fees, expenses, or taxes)
Prospectus [Line Items]	rr_ProspectusLineItems
Label	rr_AverageAnnualReturnLabel	Russell 1000 Value® Index(reflects no deduction for fees, expenses, or taxes)
1 Year	rr_AverageAnnualReturnYear01	(7.54%)
5 Years	rr_AverageAnnualReturnYear05	6.67%
Since Inception	rr_AverageAnnualReturnSinceInception	10.06%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 26, 2016
O'Shaughnessy Market Leaders Value Fund \| Risk Lose Money [Text Block]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Losing all or a portion of your investment is a risk of investing in the Fund.
O'Shaughnessy Market Leaders Value Fund \| Equity Securities Risk [Text Block]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Equity Securities Risk. The price of equity securities may rise or fall because of economic or political changes or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. The values of convertible securities tend to decline as interest rates rise and, because of the conversion feature, tend to vary with fluctuations in the market value of the underlying equity security.
O'Shaughnessy Market Leaders Value Fund \| General Market Risk Member
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including: inflation (or expectations for inflation); interest rates; global demand for particular products or resources; natural disasters or events; pandemic diseases; terrorism; regulatory events; and government controls. U.S. and international markets have experienced significant periods of volatility in recent years and months due to a number of economic, political and global macro factors, which has resulted in disruptions to business operations and supply chains, stress on the global healthcare system, growth concerns in the U.S. and overseas, staffing shortages and the inability to meet consumer demand, and widespread concern and uncertainty. Continuing uncertainties regarding interest rates, rising inflation, political events, rising government debt in the U.S. and trade tensions also contribute to market volatility. As a result of continuing political tensions and armed conflicts, including the war between Ukraine and Russia, the U.S. and the European Union imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. The war has contributed to recent market volatility and may continue to do so.
O'Shaughnessy Market Leaders Value Fund \| Value Style Investing Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Value Style Investing Risk. At times when the value investing style is out of favor, the Fund may underperform other funds that use different investing styles. Value stocks may be purchased based upon the belief that a given security may be out of favor; that belief may be misplaced or the security may stay out of favor for an extended period of time.
O'Shaughnessy Market Leaders Value Fund \| Large-Sized Companies Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Large-Sized Companies Risk. Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. In addition, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion.
O'Shaughnessy Market Leaders Value Fund \| Small- and Medium-Sized Companies Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Small- and Medium-Sized Companies Risk. Small- and medium-sized companies often have less predictable earnings, more limited product lines, markets, distribution channels or financial resources and the management of such companies may be dependent upon one or few key people. The market movements of equity securities of small- and medium-sized companies may be more abrupt and volatile than the market movements of equity securities of larger, more established companies or the stock market in general and small-sized companies in particular, are generally less liquid than the equity securities of larger companies.
O'Shaughnessy Market Leaders Value Fund \| Sector Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Sector Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies in the same sector of the market, the Fund is more susceptible to economic, political, regulatory and other occurrences influencing those sectors.
O'Shaughnessy Market Leaders Value Fund \| REITs and Foreign Real Estate Company Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	REITs and Foreign Real Estate Company Risk. Investing in REITs and foreign real estate companies makes the Fund more susceptible to risks associated with the ownership of real estate and with the real estate industry in general, as well as tax compliance risks, and may involve duplication of management fees and other expenses. REITs and foreign real estate companies may be less diversified than other pools of securities, may have lower trading volumes and may be subject to more abrupt or erratic price movements than the overall securities markets.
O'Shaughnessy Market Leaders Value Fund \| Management Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Management Risk. The Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to meet the Fund’s investment objective.
O'Shaughnessy Market Leaders Value Fund \| Depositary Receipts Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Depositary Receipts Risk. The Fund’s equity investments may take the form of sponsored or unsponsored depositary receipts. Holders of unsponsored depositary receipts generally bear all the costs of such facilities and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts of the deposited securities.
O'Shaughnessy Market Leaders Value Fund \| Foreign Securities and Emerging Markets Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Foreign Securities and Emerging Markets Risk. The risks of investing in the securities of foreign issuers, including depositary receipts, can include fluctuations in foreign currencies, foreign currency exchange controls, political and economic instability, differences in securities regulation and trading, and foreign taxation issues. These risks are greater in emerging markets.
O'Shaughnessy Market Leaders Value Fund \| Investment Company Risk [Member]
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Investment Company Risk. When the Fund invests in an ETF or mutual fund, it will bear additional expenses based on its pro rata share of the ETF’s or mutual fund’s operating expenses, including the potential duplication of management fees. The risk of owning an ETF or mutual fund generally reflects the risks of owning the underlying securities the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
O'Shaughnessy Market Leaders Value Fund \| Frontier Markets Risk Member
Prospectus [Line Items]	rr_ProspectusLineItems
Risk Narrative [Text Block]	rr_RiskTextBlock	Frontier Markets Risk. There is an additional increased risk of price volatility associated with frontier market countries (pre-emerging markets), which may be further magnified by currency fluctuations relative to the U.S. dollar. Frontier market countries generally have smaller economies or less developed capital markets than in more advanced emerging markets and, as a result, the risks of investing in emerging market countries may be magnified in frontier market countries.
O'Shaughnessy Market Leaders Value Fund \| Class I
Prospectus [Line Items]	rr_ProspectusLineItems
Trading Symbol	dei_TradingSymbol	OFVIX
Shareholder Fee, Other	rr_ShareholderFeeOther	none
Management Fees (as a percentage of Assets)	rr_ManagementFeesOverAssets	0.40%
Other Expenses (as a percentage of Assets):	rr_OtherExpensesOverAssets	0.13%
Expenses (as a percentage of Assets)	rr_ExpensesOverAssets	0.53%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	$ 54
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	170
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	296
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	$ 665
Annual Return 2017	rr_AnnualReturn2017	24.64%
Annual Return 2018	rr_AnnualReturn2018	(12.93%)
Annual Return 2019	rr_AnnualReturn2019	26.04%
Annual Return 2020	rr_AnnualReturn2020	1.75%
Annual Return 2021	rr_AnnualReturn2021	30.46%
Annual Return 2022	rr_AnnualReturn2022	(6.24%)
Label	rr_AverageAnnualReturnLabel	Return Before Taxes
1 Year	rr_AverageAnnualReturnYear01	(6.24%)
5 Years	rr_AverageAnnualReturnYear05	6.43%
Since Inception	rr_AverageAnnualReturnSinceInception	10.93%
Inception Date	rr_AverageAnnualReturnInceptionDate	Feb. 26, 2016
O'Shaughnessy Market Leaders Value Fund \| Class I \| After Taxes on Distributions
Prospectus [Line Items]	rr_ProspectusLineItems
Label	rr_AverageAnnualReturnLabel	Return After Taxes on Distributions
1 Year	rr_AverageAnnualReturnYear01	(7.83%)
5 Years	rr_AverageAnnualReturnYear05	5.44%
Since Inception	rr_AverageAnnualReturnSinceInception	10.00%
O'Shaughnessy Market Leaders Value Fund \| Class I \| After Taxes on Distributions and Sales
Prospectus [Line Items]	rr_ProspectusLineItems
Label	rr_AverageAnnualReturnLabel	Return After Taxes on Distributions and Sale of Fund Shares
1 Year	rr_AverageAnnualReturnYear01	(2.51%)
5 Years	rr_AverageAnnualReturnYear05	4.92%
Since Inception	rr_AverageAnnualReturnSinceInception	8.72%

Label

Element

Value

Prospectus [Line Items]

rr_ProspectusLineItems

Risk/Return [Heading]

rr_RiskReturnHeading

O’Shaughnessy Market Leaders Value Fund

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The O’Shaughnessy Market Leaders Value Fund’s (the “Fund”) investment objective is to seek long-term capital appreciation and current income.

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, hold, and sell shares of the Fund. You may be required to pay commissions and/or other forms of compensation to a broker for transactions in Class I shares, which are not reflected in the tables or examples below.

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

SHAREHOLDER FEES (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)

Portfolio Turnover [Heading]

rr_PortfolioTurnoverHeading

Portfolio Turnover

Portfolio Turnover [Text Block]

rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys 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 Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 63.50% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

63.50%

Expense Example [Heading]

rr_ExpenseExampleHeading

Example

Expense Example Narrative [Text Block]

rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual 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.

Expense Example by, Year, Caption [Text]

rr_ExpenseExampleByYearCaption

Although your actual costs may be higher or lower, based on these assumptions, your costs would be:

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal market conditions, the Fund invests primarily in a diversified portfolio of common stocks and other equity securities of companies of all sizes, including but not limited to, American Depositary Receipts (“ADRs”), preferred stocks, limited partnerships, and convertible securities. O’Shaughnessy Asset Management, LLC (the “Adviser”) employs a bottom-up, quantitative, factor-based approach to security selection based on research and analysis of

historical data. The Adviser may eliminate or substitute factors at its discretion. Portfolio securities may be sold generally upon periodic rebalancing of the Fund’s portfolio. For selling decisions, the Adviser considers the same factors it uses in evaluating a security for purchase and generally sells securities when it believes such securities no longer meet its investment criteria. The Fund may from time to time emphasize investment in certain sectors of the market.

The Adviser screens securities using a factor-based model that seeks to identify market leading companies by analysis of a number of factors including, but not limited to, low valuations, strong financial strength, conservative earnings reporting (earnings quality), strong earnings growth, market capitalization and volume. The Fund selects companies that offer a strong “shareholder yield” – the combination of dividend yield and the rate at which the company is buying back shares of its stock – at the time of initial purchase. While stocks often have both a strong dividend yield and a high rate of share repurchases, that may not always be the case. An individual stock may be deemed to be attractive even if its entire shareholder yield is generated from either dividends or share repurchases. Due to ongoing research, the Adviser may modify the characteristics utilized in the investment strategy, without prior notice to shareholders, in order to better achieve the investment objective.

The Fund will primarily invest in common stocks of U.S. issuers but may also invest up to 20% of its total assets in common stocks of foreign securities and issuers, which may also include issuers located in emerging markets and frontier markets, also known as “pre-emerging markets,” as defined by countries listed on the Morgan Stanley Capital International (“MSCI”) Emerging Markets Index and/or the MSCI Frontier Markets Index. The Fund may invest up to 25% of its total assets in real estate investment trusts (“REITs”) or foreign real estate companies. The Fund may also invest up to 20% of its total assets in depositary receipts of foreign based companies (i.e., ADRs, European Depositary Receipts (“EDRs”), and Global Depositary Receipts (“GDRs”), etc.) whose common stock is not itself listed on a U.S. exchange. Depositary receipts may be purchased through “sponsored” or “unsponsored” facilities. A sponsored facility is established jointly by the issuer of the underlying security and a depositary, whereas a depositary may establish an unsponsored facility without participation by the issuer of the depositary security. The Fund may invest up to 10% of its total assets in other investment companies, including exchange-traded funds (“ETFs”).

The Fund may also invest up to 100% of the Fund’s total assets in cash, cash equivalents, and high-quality, short-term debt securities, money market mutual funds and money market instruments for temporary defensive purposes. The Fund may also invest up to 50% of its total assets in ETFs that are aligned with the Fund’s principal investment strategies, for temporary defensive purposes.

Risk [Heading]

rr_RiskHeading

Principal Risks of Investing in the Fund

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The following information provides some indication of the risks of investing in the Fund. The bar chart shows the annual return for the Fund’s Class I shares from year to year. The table shows how the Fund’s average annual returns for 1 year, 5 years, and since inception compare with those of a broad measure of market performance. The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available on the Fund’s website at www.osfunds.com or by calling the Fund toll-free at 1-877-291-7827.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The following information provides some indication of the risks of investing in the Fund.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

1-877-291-7827

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.osfunds.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Fund’s past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.

Bar Chart [Heading]

rr_BarChartHeading

Calendar Year Total Return as of December 31 – Class I

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

The Fund’s calendar year-to-date return as of September 30, 2023 was 6.23%. During the period of time shown in the bar chart, the Fund’s highest quarterly return was 20.85% for the quarter ended December 31, 2020 and the lowest quarterly return was -30.77% for the quarter ended March 31, 2020.

Year to Date Return, Label

rr_YearToDateReturnLabel

year-to-date return

Bar Chart, Year to Date Return, Date

rr_BarChartYearToDateReturnDate

Sep. 30, 2023

Bar Chart, Year to Date Return

rr_BarChartYearToDateReturn

6.23%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

highest quarterly return

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Dec. 31, 2020

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

20.85%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

lowest quarterly return

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Mar. 31, 2020

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(30.77%)

Performance Table Heading

rr_PerformanceTableHeading

Average Annual Total Returns (for the period ended December 31, 2022)

Performance Table Uses Highest Federal Rate

rr_PerformanceTableUsesHighestFederalRate

The after-tax returns were 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 after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”).

Performance Table Explanation after Tax Higher

rr_PerformanceTableExplanationAfterTaxHigher

The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.

Performance Table Closing [Text Block]

rr_PerformanceTableClosingTextBlock

The after-tax returns were 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 after-tax returns are not relevant to investors who hold shares of the Fund through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts (“IRAs”). The Return After Taxes on Distributions and Sale of Fund Shares is higher than other return figures when a capital loss occurs upon redemption and provides an assumed tax deduction that benefits the investor.

O'Shaughnessy Market Leaders Value Fund | Russell 1000 Value® Index (reflects no deduction for fees, expenses, or taxes)

Prospectus [Line Items]

rr_ProspectusLineItems

Label

rr_AverageAnnualReturnLabel

Russell 1000 Value® Index(reflects no deduction for fees, expenses, or taxes)

1 Year

rr_AverageAnnualReturnYear01

(7.54%)

5 Years

rr_AverageAnnualReturnYear05

6.67%

Since Inception

rr_AverageAnnualReturnSinceInception

10.06%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 26, 2016

O'Shaughnessy Market Leaders Value Fund | Risk Lose Money [Text Block]

Prospectus [Line Items]

rr_ProspectusLineItems

Risk Narrative [Text Block]

rr_RiskTextBlock

Losing all or a portion of your investment is a risk of investing in the Fund.

O'Shaughnessy Market Leaders Value Fund | Equity Securities Risk [Text Block]

Prospectus [Line Items]

rr_ProspectusLineItems

Risk Narrative [Text Block]

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Equity Securities Risk. The price of equity securities may rise or fall because of economic or political changes or changes in a company’s financial condition, sometimes rapidly or unpredictably. These price movements may result from factors affecting individual companies, sectors or industries selected for the Fund’s portfolio or the securities market as a whole, such as changes in economic or political conditions. The values of convertible securities tend to decline as interest rates rise and, because of the conversion feature, tend to vary with fluctuations in the market value of the underlying equity security.

O'Shaughnessy Market Leaders Value Fund | General Market Risk Member

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General Market Risk. Economies and financial markets throughout the world are becoming increasingly interconnected, which increases the likelihood that events or conditions in one country or region will adversely impact markets or issuers in other countries or regions. Securities in the Fund’s portfolio may underperform in comparison to securities in general financial markets, a particular financial market or other asset classes due to a number of factors, including: inflation (or expectations for inflation); interest rates; global demand for particular products or resources; natural disasters or events; pandemic diseases; terrorism; regulatory events; and government controls. U.S. and international markets have experienced significant periods of volatility in recent years and months due to a number of economic, political and global macro factors, which has resulted in disruptions to business operations and supply chains, stress on the global healthcare system, growth concerns in the U.S. and overseas, staffing shortages and the inability to meet consumer demand, and widespread concern and uncertainty. Continuing uncertainties regarding interest rates, rising inflation, political events, rising government debt in the U.S. and trade tensions also contribute to market volatility. As a result of continuing political tensions and armed conflicts, including the war between Ukraine and Russia, the U.S. and the European Union imposed sanctions on certain Russian individuals and companies, including certain financial institutions, and have limited certain exports and imports to and from Russia. The war has contributed to recent market volatility and may continue to do so.

O'Shaughnessy Market Leaders Value Fund | Value Style Investing Risk [Member]

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Value Style Investing Risk. At times when the value investing style is out of favor, the Fund may underperform other funds that use different investing styles. Value stocks may be purchased based upon the belief that a given security may be out of favor; that belief may be misplaced or the security may stay out of favor for an extended period of time.

O'Shaughnessy Market Leaders Value Fund | Large-Sized Companies Risk [Member]

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Large-Sized Companies Risk. Larger, more established companies may be unable to respond quickly to new competitive challenges like changes in consumer tastes or innovative smaller competitors. In addition, large-cap companies are sometimes unable to attain the high growth rates of successful, smaller companies, especially during extended periods of economic expansion.

O'Shaughnessy Market Leaders Value Fund | Small- and Medium-Sized Companies Risk [Member]

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Small- and Medium-Sized Companies Risk. Small- and medium-sized companies often have less predictable earnings, more limited product lines, markets, distribution channels or financial resources and the management of such companies may be dependent upon one or few key people. The market movements of equity securities of small- and medium-sized companies may be more abrupt and volatile than the market movements of equity securities of larger, more established companies or the stock market in general and small-sized companies in particular, are generally less liquid than the equity securities of larger companies.

O'Shaughnessy Market Leaders Value Fund | Sector Risk [Member]

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Sector Risk. To the extent the Fund invests a significant portion of its assets in the securities of companies in the same sector of the market, the Fund is more susceptible to economic, political, regulatory and other occurrences influencing those sectors.

O'Shaughnessy Market Leaders Value Fund | REITs and Foreign Real Estate Company Risk [Member]

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REITs and Foreign Real Estate Company Risk. Investing in REITs and foreign real estate companies makes the Fund more susceptible to risks associated with the ownership of real estate and with the real estate industry in general, as well as tax compliance risks, and may involve duplication of management fees and other expenses. REITs and foreign real estate companies may be less diversified than other pools of securities, may have lower trading volumes and may be subject to more abrupt or erratic price movements than the overall securities markets.

O'Shaughnessy Market Leaders Value Fund | Management Risk [Member]

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Management Risk. The Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to meet the Fund’s investment objective.

O'Shaughnessy Market Leaders Value Fund | Depositary Receipts Risk [Member]

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Depositary Receipts Risk. The Fund’s equity investments may take the form of sponsored or unsponsored depositary receipts. Holders of unsponsored depositary receipts generally bear all the costs of such facilities and the depositary of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited security or to pass through voting rights to the holders of such receipts of the deposited securities.

O'Shaughnessy Market Leaders Value Fund | Foreign Securities and Emerging Markets Risk [Member]

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Foreign Securities and Emerging Markets Risk. The risks of investing in the securities of foreign issuers, including depositary receipts, can include fluctuations in foreign currencies, foreign currency exchange controls, political and economic instability, differences in securities regulation and trading, and foreign taxation issues. These risks are greater in emerging markets.

O'Shaughnessy Market Leaders Value Fund | Investment Company Risk [Member]

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Investment Company Risk. When the Fund invests in an ETF or mutual fund, it will bear additional expenses based on its pro rata share of the ETF’s or mutual fund’s operating expenses, including the potential duplication of management fees. The risk of owning an ETF or mutual fund generally reflects the risks of owning the underlying securities the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.

O'Shaughnessy Market Leaders Value Fund | Frontier Markets Risk Member

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Frontier Markets Risk. There is an additional increased risk of price volatility associated with frontier market countries (pre-emerging markets), which may be further magnified by currency fluctuations relative to the U.S. dollar. Frontier market countries generally have smaller economies or less developed capital markets than in more advanced emerging markets and, as a result, the risks of investing in emerging market countries may be magnified in frontier market countries.

O'Shaughnessy Market Leaders Value Fund | Class I

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Trading Symbol

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OFVIX

Shareholder Fee, Other

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none

Management Fees (as a percentage of Assets)

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0.40%