Investment Strategy	Mar. 31, 2026
PIA BBB Bond Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	Under normal market conditions, the BBB Bond Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in bonds rated BBB by S&P Global Ratings, Baa by Moody’s Ratings or BBB by Fitch Ratings. The BBB-rated bonds are defined by the Bloomberg index methodology. The Fund seeks to approximate returns of bonds rated within the BBB category by any credit rating agency currently registered with the U.S. Securities and Exchange Commission (“SEC”) as NRSROs. The weighted average duration of the BBB Bond Fund will generally range from four to eight years. Duration is a measure of a debt security’s price sensitivity. Higher duration indicates bonds that are more sensitive to interest rate changes. Bonds with shorter duration reduce the risk associated with interest rates. Duration takes into account a debt security’s cash flows over time, including assumptions about the timing of how a debt security might be prepaid by the issuer or redeemed by the holder prior to its stated maturity date. In contrast, maturity measures only the time until final payment is due. In selecting investments for the BBB Bond Fund, the Adviser will primarily consider credit quality, duration and yield. The BBB Bond Fund may invest up to 50% of its total assets in securities of foreign issuers denominated in U.S. dollars, including issuers located in emerging markets. In its effort to provide a total rate of return that approximates that of bonds rated within the BBB category as defined by the Bloomberg index methodology, the BBB Bond Fund may invest up to 10% of its net assets in futures, options and other derivatives. The Fund may sometimes use derivatives as a substitute for taking a position in bonds rated BBB or Baa and/or as part of a strategy designed to reduce or increase exposure to other risks, such as interest rate risk.
Strategy Portfolio Concentration [Text]	The BBB Bond Fund may invest up to 50% of its total assets in securities of foreign issuers denominated in U.S. dollars, including issuers located in emerging markets.In its effort to provide a total rate of return that approximates that of bonds rated within the BBB category as defined by the Bloomberg index methodology, the BBB Bond Fund may invest up to 10% of its net assets in futures, options and other derivatives.
PIA MBS Bond Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	Under normal market conditions, the MBS Bond Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in mortgage-backed securities, including commercial mortgage-backed securities. In pursuing its objective, the Adviser attempts to provide a return that exceeds the total rate of return of the MBS Index, although there is no guarantee that the Adviser will be able to do so. The MBS Index represents the universe of mortgage-backed securities issued by the Government National Mortgage Association (“GNMA”), Federal National Mortgage Association (“FNMA”) and Federal Home Loan Mortgage Corporation (“FHLMC”). The Adviser will primarily consider credit quality, effective duration and yield in selecting investments for the Fund’s portfolio. The duration of the Fund will generally be in a range of plus or minus 1.5 years of the effective duration of the MBS Index. The MBS Bond Fund may invest up to 10% of its net assets in futures, options, other derivatives, and up to 20% in other investment companies, including exchange-traded funds (“ETFs”). The Fund may sometimes use derivatives as a substitute for taking positions in bonds and/or as part of a strategy designed to reduce exposure to other risks. The Fund may also utilize the “To Be Announced” (“TBA”) market for mortgage-backed securities for up to 100% of its net assets. The TBA market allows investors to gain exposure to mortgage-backed securities with certain broad characteristics (maturity, coupon, etc.) without taking delivery of the actual securities until the settlement day which is once every month. In addition, the Fund may utilize the dollar roll market, in which one sells, in the TBA market, the security for current month settlement, while simultaneously committing to buy a substantially similar TBA security for next month settlement. Rule 18f-4 under the 1940 Act permits the Fund to invest in TBA securities, notwithstanding the limitation on the issuance of senior securities in Section 18 of the 1940 Act, provided that the Fund intends to physically settle the transaction and the transaction will settle within 35 days of its trade date (the “Delayed-Settlement Securities Provision”). A TBA security that does not satisfy the Delayed-Settlement Securities Provision is treated as a derivatives transaction under Rule 18f-4. The Fund may utilize the dollar roll market for extended periods of time without taking delivery of the physical securities. The Fund may also invest up to 20% of its net assets in asset-backed securities. The MBS Bond Fund’s annual portfolio turnover rate may exceed 100%.
Strategy Portfolio Concentration [Text]	The MBS Bond Fund may invest up to 10% of its net assets in futures, options, other derivatives, and up to 20% in other investment companies, including exchange-traded funds (“ETFs”). The Fund may sometimes use derivatives as a substitute for taking positions in bonds and/or as part of a strategy designed to reduce exposure to other risks. The Fund may also utilize the “To Be Announced” (“TBA”) market for mortgage-backed securities for up to 100% of its net assets. The TBA market allows investors to gain exposure to mortgage-backed securities with certain broad characteristics (maturity, coupon, etc.) without taking delivery of the actual securities until the settlement day which is once every month. In addition, the Fund may utilize the dollar roll market, in which one sells, in the TBA market, the security for current month settlement, while simultaneously committing to buy a substantially similar TBA security for next month settlement. Rule 18f-4 under the 1940 Act permits the Fund to invest in TBA securities, notwithstanding the limitation on the issuance of senior securities in Section 18 of the 1940 Act, provided that the Fund intends to physically settle the transaction and the transaction will settle within 35 days of its trade date (the “Delayed-Settlement Securities Provision”). A TBA security that does not satisfy the Delayed-Settlement Securities Provision is treated as a derivatives transaction under Rule 18f-4. The Fund may utilize the dollar roll market for extended periods of time without taking delivery of the physical securities. The Fund may also invest up to 20% of its net assets in asset-backed securities.
PIA High Yield (MACS) Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	The High Yield (MACS) Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of domestic and foreign high yield instruments (“junk bonds”), defined as bonds, convertible securities, forward commitments, loan participations and assignments, preferred stocks and Rule 144A securities. High yield instruments are securities rated below investment grade as defined by the Bloomberg index methodology, or, if unrated, determined by the Adviser to be of comparable quality. The remainder of the High Yield (MACS) Fund’s assets may be invested in investment grade instruments including bonds, debt securities, convertible securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities, and loan participations and assignments. The average portfolio duration of the High Yield (MACS) Fund normally varies within two years (plus or minus) of the duration of the Bloomberg U.S. Corporate High-Yield Index (the “Bloomberg Index”) at any point in time. The Bloomberg Index had a duration of 2.84 years as of January 31, 2026. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security’s price to changes in interest rates. The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. The High Yield (MACS) Fund may invest up to 10% of its net assets in derivative instruments, such as options, futures contracts or swap agreements for both bona fide hedging purposes and for speculative purposes. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 100% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in a combination of derivative instruments and other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). In selecting investments for the High Yield (MACS) Fund, the Adviser will consider the risks and opportunities presented by the industries within the high yield universe. The Adviser evaluates the bond issuers within the selected industries and identifies those investments which the Adviser believes have favorable risk reward characteristics and match the Adviser’s investing philosophy. The Adviser evaluates various criteria such as historical and future expected financial performance, management tenure and experience, capital structure, free cash flow generation, barriers to entry, security protections, yield and relative value, and ownership structure. Investments are targeted that have individual yield premiums which appear to be favorable and are viewed by the Adviser as having a comparable or lower probability of default and/or loss risk.
Strategy Portfolio Concentration [Text]	The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries.The High Yield (MACS) Fund may invest up to 10% of its net assets in derivative instruments, such as options, futures contracts or swap agreements for both bona fide hedging purposes and for speculative purposes.
PIA Short-Term Securities Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	The Fund is a diversified investment company that normally invests at least 80% of its net assets in short-term securities having a duration of less than three years. Under normal market conditions, the Fund purchases securities rated BBB- and/or Baa3 or better by a Nationally Recognized Statistical Rating Organization (“NRSRO”). The Fund primarily invests in securities issued or guaranteed by the U.S. government and its agencies (including U.S. Treasury Notes), investment grade mortgage-backed securities (including commercial mortgage-backed securities and residential mortgage-backed securities), and investment grade debt securities (including corporate debt securities, asset-backed securities, and collateralized mortgage obligations). The Fund may also invest in Rule 144A securities. The Fund may invest up to 10% of its net assets in other investment companies (mutual funds and exchange-traded funds (“ETFs”)), including in any mutual fund advised by the Adviser (a “PIA Fund”), provided that investment in an investment company that predominantly invests in high yield (‘junk bond”) securities will count towards the Fund’s limitation of no more than 10% of the Fund’s net assets invested in high yield securities. To the extent that the Fund invests in a PIA Fund, the Adviser will waive any management fee charged by the PIA Fund. The Fund may also invest in ETFs that provide exposure to AAA-rated collateralized loan obligations (CLOs). Duration is a measure of a debt security’s price sensitivity. Higher duration indicates bonds that are more sensitive to interest rate changes. Bonds with shorter duration have lower risk associated with interest rates. Duration takes into account a debt security’s cash flows over time including the possibility that a debt security might be prepaid by the issuer or redeemed by the holder prior to its stated maturity date. In contrast, maturity measures only the time until final payment is due. The weighted average duration of the Fund portfolio will generally range from six months on the short end to three years on the long end. In selecting investments for the Fund, the Adviser primarily will consider credit quality, duration and yield.
Strategy Portfolio Concentration [Text]	The Fund may invest up to 10% of its net assets in other investment companies (mutual funds and exchange-traded funds (“ETFs”)), including in any mutual fund advised by the Adviser (a “PIA Fund”), provided that investment in an investment company that predominantly invests in high yield (‘junk bond”) securities will count towards the Fund’s limitation of no more than 10% of the Fund’s net assets invested in high yield securities.
Institutional Class Prospectus \| PIA High Yield Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of domestic and foreign high yield instruments (“junk bonds”), defined as bonds, convertible securities, forward commitments, loan participations and assignments, preferred stocks and Rule 144A securities. High yield instruments are securities rated below investment grade as defined by the Bloomberg index methodology, or Bond rating services currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”) or, if unrated, determined by the Adviser to be of comparable quality. The remainder of the Fund’s assets may be invested in investment grade instruments including bonds, debt securities, convertible securities, and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities, and loan participations and assignments. The average portfolio duration of the Fund normally varies within two years (plus or minus) of the duration of the Bloomberg U.S. Corporate High-Yield Index (the “Bloomberg Index”) at any point in time. The Bloomberg Index had a duration of 2.84 years as of January 31, 2026. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security’s price to changes in interest rates. The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). In selecting investments for the Fund, the Adviser will consider the risks and opportunities presented by the industries within the high yield universe. The Adviser evaluates the bond issuers within the selected industries and identifies those investments which the Adviser believes have favorable risk reward characteristics and match the Adviser’s investing philosophy. The Adviser evaluates various criteria such as historical and future expected financial performance, management tenure and experience, capital structure, free cash flow generation, barriers to entry, security protections, yield and relative value, and ownership structure. Investments are targeted that have individual yield premiums which appear to be favorable and are viewed by the Adviser as having a comparable or lower probability of default and/or loss risk.
Strategy Portfolio Concentration [Text]	The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy.
Class A Prospectus \| PIA High Yield Fund
Prospectus [Line Items]
Strategy [Heading]	Principal Investment Strategies of the Fund
Strategy Narrative [Text Block]	The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of domestic and foreign high yield instruments (“junk bonds”), defined as bonds, convertible securities, forward commitments, loan participations and assignments, preferred stocks and Rule 144A securities. High yield instruments are securities rated below investment grade as defined by the Bloomberg index methodology, or Bond rating services currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”) or, if unrated, determined by the Adviser to be of comparable quality. The remainder of the Fund’s assets may be invested in investment grade instruments including bonds, debt securities, convertible securities, and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities, and loan participations and assignments. The average portfolio duration of the Fund normally varies within two years (plus or minus) of the duration of the Bloomberg U.S. Corporate High-Yield Index (the “Bloomberg Index”) at any point in time. The Bloomberg Index had a duration of 2.84 years as of January 31, 2026. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security’s price to changes in interest rates. The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls). In selecting investments for the Fund, the Adviser will consider the risks and opportunities presented by the industries within the high yield universe. The Adviser evaluates the bond issuers within the selected industries and identifies those investments which the Adviser believes have favorable risk reward characteristics and match the Adviser’s investing philosophy. The Adviser evaluates various criteria such as historical and future expected financial performance, management tenure and experience, capital structure, free cash flow generation, barriers to entry, security protections, yield and relative value, and ownership structure. Investments are targeted that have individual yield premiums which appear to be favorable and are viewed by the Adviser as having a comparable or lower probability of default and/or loss risk.
Strategy Portfolio Concentration [Text]	The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy

Investment Strategy

Mar. 31, 2026

Principal Investment Strategies of the Fund

Under normal market conditions, the BBB Bond Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in bonds rated BBB by S&P Global Ratings, Baa by Moody’s Ratings or BBB by Fitch Ratings. The BBB-rated bonds are defined by the Bloomberg index methodology. The Fund seeks to approximate returns of bonds rated within the BBB category by any credit rating agency currently registered with the U.S. Securities and Exchange Commission (“SEC”) as NRSROs.

The weighted average duration of the BBB Bond Fund will generally range from four to eight years. Duration is a measure of a debt security’s price sensitivity. Higher duration indicates bonds that are more sensitive to interest rate changes. Bonds with shorter duration reduce the risk associated with interest rates. Duration takes into account a debt security’s cash flows over time, including assumptions about the timing of how a debt security might be prepaid by the issuer or redeemed by the holder prior to its stated maturity date. In contrast, maturity measures only the time until final payment is due.

In selecting investments for the BBB Bond Fund, the Adviser will primarily consider credit quality, duration and yield.

The BBB Bond Fund may invest up to 50% of its total assets in securities of foreign issuers denominated in U.S. dollars, including issuers located in emerging markets.

In its effort to provide a total rate of return that approximates that of bonds rated within the BBB category as defined by the Bloomberg index methodology, the BBB Bond Fund may invest up to 10% of its net assets in futures, options and other derivatives. The Fund may sometimes use derivatives as a substitute for taking a position in bonds rated BBB or Baa and/or as part of a strategy designed to reduce or increase exposure to other risks, such as interest rate risk.

Strategy Portfolio Concentration [Text]

The BBB Bond Fund may invest up to 50% of its total assets in securities of foreign issuers denominated in U.S. dollars, including issuers located in emerging markets.In its effort to provide a total rate of return that approximates that of bonds rated within the BBB category as defined by the Bloomberg index methodology, the BBB Bond Fund may invest up to 10% of its net assets in futures, options and other derivatives.

PIA MBS Bond Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

Under normal market conditions, the MBS Bond Fund invests at least 80% of its net assets (plus any borrowings for investment purposes) in mortgage-backed securities, including commercial mortgage-backed securities. In pursuing its objective, the Adviser attempts to provide a return that exceeds the total rate of return of the MBS Index, although there is no guarantee that the Adviser will be able to do so. The MBS Index represents the universe of mortgage-backed securities issued by the Government National Mortgage Association (“GNMA”), Federal National Mortgage Association (“FNMA”) and Federal Home Loan Mortgage Corporation (“FHLMC”). The Adviser will primarily consider credit quality, effective duration and yield in selecting investments for the Fund’s portfolio. The duration of the Fund will generally be in a range of plus or minus 1.5 years of the effective duration of the MBS Index.

The MBS Bond Fund may invest up to 10% of its net assets in futures, options, other derivatives, and up to 20% in other investment companies, including exchange-traded funds (“ETFs”). The Fund may sometimes use derivatives as a substitute for taking positions in bonds and/or as part of a strategy designed to reduce exposure to other risks. The Fund may also utilize the “To Be Announced” (“TBA”) market for mortgage-backed securities for up to 100% of its net assets. The TBA market allows investors to gain exposure to mortgage-backed securities with certain broad characteristics (maturity, coupon, etc.) without taking delivery of the actual securities until the settlement day which is once every month. In addition, the Fund may utilize the dollar roll market, in which one sells, in the TBA market, the security for current month settlement, while simultaneously committing to buy a substantially similar TBA security for next month settlement. Rule 18f-4 under the 1940 Act permits the Fund to invest in TBA securities, notwithstanding the limitation on the issuance of senior securities in Section 18 of the 1940 Act, provided that the Fund intends to physically settle the transaction and the transaction will settle within 35 days of its trade date (the “Delayed-Settlement Securities Provision”). A TBA security that does not satisfy the Delayed-Settlement Securities Provision is treated as a derivatives transaction under Rule 18f-4. The Fund may utilize the dollar roll market for extended periods of time without taking delivery of the physical securities. The Fund may also invest up to 20% of its net assets in asset-backed securities.

The MBS Bond Fund’s annual portfolio turnover rate may exceed 100%.

Strategy Portfolio Concentration [Text]

PIA High Yield (MACS) Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

The High Yield (MACS) Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of domestic and foreign high yield instruments (“junk bonds”), defined as bonds, convertible securities, forward commitments, loan participations and assignments, preferred stocks and Rule 144A securities. High yield instruments are

securities rated below investment grade as defined by the Bloomberg index methodology, or, if unrated, determined by the Adviser to be of comparable quality.

The remainder of the High Yield (MACS) Fund’s assets may be invested in investment grade instruments including bonds, debt securities, convertible securities and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities, and loan participations and assignments.

The average portfolio duration of the High Yield (MACS) Fund normally varies within two years (plus or minus) of the duration of the Bloomberg U.S. Corporate High-Yield Index (the “Bloomberg Index”) at any point in time. The Bloomberg Index had a duration of 2.84 years as of January 31, 2026. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security’s price to changes in interest rates.

The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries.

The High Yield (MACS) Fund may invest up to 10% of its net assets in derivative instruments, such as options, futures contracts or swap agreements for both bona fide hedging purposes and for speculative purposes.

From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 100% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in a combination of derivative instruments and other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).

In selecting investments for the High Yield (MACS) Fund, the Adviser will consider the risks and opportunities presented by the industries within the high yield universe. The Adviser evaluates the bond issuers within the selected industries and identifies those investments which the Adviser believes have favorable risk reward characteristics and match the Adviser’s investing philosophy. The Adviser evaluates various criteria such as historical and future expected financial performance, management tenure and experience, capital structure, free cash flow generation, barriers to entry, security protections, yield and relative value, and ownership structure. Investments are targeted that have individual yield premiums which appear to be favorable and are viewed by the Adviser as having a comparable or lower probability of default and/or loss risk.

Strategy Portfolio Concentration [Text]

The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries.The High Yield (MACS) Fund may invest up to 10% of its net assets in derivative instruments, such as options, futures contracts or swap agreements for both bona fide hedging purposes and for speculative purposes.

PIA Short-Term Securities Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

The Fund is a diversified investment company that normally invests at least 80% of its net assets in short-term securities having a duration of less than three years. Under normal market conditions, the Fund purchases securities rated BBB- and/or Baa3 or better by a Nationally Recognized Statistical Rating Organization (“NRSRO”).

The Fund primarily invests in securities issued or guaranteed by the U.S. government and its agencies (including U.S. Treasury Notes), investment grade mortgage-backed securities (including commercial mortgage-backed securities and residential mortgage-backed securities), and investment grade debt securities (including corporate debt securities, asset-backed securities, and collateralized mortgage obligations). The Fund may also invest in Rule 144A securities.

The Fund may invest up to 10% of its net assets in other investment companies (mutual funds and exchange-traded funds (“ETFs”)), including in any mutual fund advised by the Adviser (a “PIA Fund”), provided that investment in an investment company that predominantly invests in high yield (‘junk bond”) securities will count towards the Fund’s limitation of no more than 10% of the Fund’s net assets invested in high yield securities. To the extent that the Fund invests in a PIA Fund, the Adviser will waive any management fee charged by the PIA Fund. The Fund may also invest in ETFs that provide exposure to AAA-rated collateralized loan obligations (CLOs).

Duration is a measure of a debt security’s price sensitivity. Higher duration indicates bonds that are more sensitive to interest rate changes. Bonds with shorter duration have lower risk associated with interest rates. Duration takes into account a debt security’s cash flows over time including the possibility that a debt security might be prepaid by the issuer or redeemed by the holder prior to its stated maturity date. In contrast, maturity measures only the time until final payment is due. The weighted average duration of the Fund portfolio will generally range from six months on the short end to three years on the long end.

In selecting investments for the Fund, the Adviser primarily will consider credit quality, duration and yield.

Strategy Portfolio Concentration [Text]

Institutional Class Prospectus | PIA High Yield Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

The Fund invests, under normal circumstances, at least 80% of its net assets (plus any borrowings for investment purposes) in a diversified portfolio of domestic and foreign high yield instruments (“junk bonds”), defined as bonds, convertible securities, forward commitments, loan participations and assignments, preferred stocks and Rule 144A securities. High yield instruments are securities rated below investment grade as defined by the Bloomberg index methodology, or Bond rating services currently registered as Nationally Recognized Statistical Rating Organizations (“NRSROs”) or, if unrated, determined by the Adviser to be of comparable quality.

The remainder of the Fund’s assets may be invested in investment grade instruments including bonds, debt securities, convertible securities, and other similar instruments issued by various U.S. and non-U.S. public- or private-sector entities, and loan participations and assignments.

The average portfolio duration of the Fund normally varies within two years (plus or minus) of the duration of the Bloomberg U.S. Corporate High-Yield Index (the “Bloomberg Index”) at any point in time. The Bloomberg Index had a duration of 2.84 years as of January 31, 2026. Duration is a measure of the expected life of a fixed income security that is used to determine the sensitivity of a security’s price to changes in interest rates.

The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries.

From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).

In selecting investments for the Fund, the Adviser will consider the risks and opportunities presented by the industries within the high yield universe. The Adviser evaluates the bond issuers within the selected industries and identifies those investments which the Adviser believes have favorable risk reward characteristics and match the Adviser’s investing philosophy. The Adviser evaluates various criteria such as historical and future expected financial performance, management tenure and experience, capital structure, free cash flow generation, barriers to entry, security protections, yield and relative value, and ownership structure. Investments are targeted that have individual yield premiums which appear to be favorable and are viewed by the Adviser as having a comparable or lower probability of default and/or loss risk.

Strategy Portfolio Concentration [Text]

The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries. From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy.

Class A Prospectus | PIA High Yield Fund

Prospectus [Line Items]

Strategy [Heading]

Principal Investment Strategies of the Fund

Strategy Narrative [Text Block]

The Fund may invest up to 10% of its net assets in securities and instruments that are economically tied to emerging market countries.

From time to time, the Fund may experience significant inflows; if this occurs, the Fund may, on a temporary or interim basis, invest these new assets (potentially in an amount which may approach up to 50% of the Fund’s total net assets if new flows were extremely large relative to the Fund’s current assets) in other investment companies, including exchange-traded funds (“ETFs”), until such time as the Adviser can identify and invest in appropriate high yield instruments in accordance with the Fund’s principal strategy. The Fund may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis. The Fund may, without limitation, seek to obtain market exposure to the securities in which it primarily invests by entering into a series of purchase and sale contracts or by using other investment techniques (such as buy backs or dollar rolls).

Strategy Portfolio Concentration [Text]