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Investment Risks
Mar. 31, 2026
PIA BBB Bond Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block]
•Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
PIA BBB Bond Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The BBB Bond Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
PIA BBB Bond Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed-income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
PIA BBB Bond Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other debt securities held by the BBB Bond Fund may not be able to make interest or principal payments.
PIA BBB Bond Fund | Prepayment Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Prepayment Risk. Issuers of securities held by the BBB Bond Fund may be able to prepay principal due on these securities, particularly during periods of declining interest rates. Securities subject to prepayment risk generally offer less potential for gains when interest rates decline, and may offer a greater potential for loss when interest rates rise. When debt obligations are prepaid or when
securities are called, the Fund may have to reinvest in securities with a lower yield. Prepayment risk is a major risk of mortgage-backed securities.
PIA BBB Bond Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
PIA BBB Bond Fund | Derivatives Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Derivatives Risk. Derivatives involve the risk of improper valuation, the risk of ambiguous documentation and the risk that changes in the value of the derivative may not correlate closely with the underlying security. Losses from a derivative instrument may be greater than the amount invested in the derivative instrument. Certain derivatives have the potential for unlimited losses, regardless of the size of the initial investment.
PIA BBB Bond Fund | Risks Associated With Inflation And Deflation Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Inflation and Deflation. Inflation risk is the risk that increasing prices throughout the economy may erode the purchasing power of an investment over time. Deflation risk is the risk that prices throughout the economy decline over time — the opposite of inflation.
PIA BBB Bond Fund | High Yield Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] High Yield Securities Risk. The BBB Bond Fund may hold high yield securities as a result of credit rating downgrades. Securities with ratings lower than BBB or Baa are known as “high yield” securities (commonly known as “junk bonds”). High yield securities typically carry higher coupon rates than investment grade securities, but also are considered as speculative and may be subject to greater market price fluctuations, less liquidity and greater risk of loss of income or principal including greater possibility of default and bankruptcy of the issuer of such instruments than more highly rated bonds and loans.
PIA BBB Bond Fund | Foreign And Emerging Market Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Foreign and Emerging Market Securities Risk. Investments in foreign currencies and foreign issuers are subject to additional risks, including political and economic risks, greater volatility, civil conflicts and war, sanctions or other measures by the United States or other governments, liquidity risks, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, expropriation and nationalization risks, and less stringent investor protection and disclosure standards of foreign markets. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable becoming riskier and more volatile. These risks are magnified in countries in “emerging markets.” Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.
PIA BBB Bond Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the BBB Bond Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
PIA BBB Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.
PIA MBS Bond Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
PIA MBS Bond Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The MBS Bond Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
PIA MBS Bond Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed-income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
PIA MBS Bond Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other debt securities held by the MBS Bond Fund may not be able to make interest or principal payments.
PIA MBS Bond Fund | Prepayment Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Prepayment Risk. Issuers of securities held by the MBS Bond Fund may be able to prepay principal due on these securities, particularly during periods of declining interest rates. Securities subject to prepayment risk generally offer less potential for gains when interest rates decline, and may offer a greater potential for loss when interest rates rise. When debt obligations are prepaid or when securities are called, the Fund may have to reinvest in securities with a lower yield. Prepayment risk is a major risk of mortgage-backed securities.
PIA MBS Bond Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
PIA MBS Bond Fund | Derivatives Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Derivatives Risk. Derivatives involve the risk of improper valuation, the risk of ambiguous documentation and the risk that changes in the value of the derivative may not correlate closely with the underlying security. Losses from a derivative instrument may be greater than the amount invested in the derivative instrument. Certain derivatives have the potential for unlimited losses, regardless of the size of the initial investment.
PIA MBS Bond Fund | Risks Associated With Inflation And Deflation Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Inflation and Deflation. Inflation risk is the risk that increasing prices throughout the economy may erode the purchasing power of an investment over time. Deflation risk is the risk that prices throughout the economy decline over time — the opposite of inflation.
PIA MBS Bond Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the MBS Bond Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
PIA MBS Bond Fund | Extension Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Extension Risk. An issuer may pay principal on an obligation held by the Fund (such as an asset-backed or mortgage-backed security) later than expected. This may happen during a period of rising interest rates. Under these circumstances, the value of the obligation will decrease.
PIA MBS Bond Fund | Risks Associated With Mortgage-Backed Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Mortgage-Backed Securities. These risks include General Market Risk, Interest Rate Risk, Credit Risk, Prepayment Risk and Extension Risk (each described above). During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid.
PIA MBS Bond Fund | Risks Associated With Real Estate And Regulatory Actions Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Real Estate and Regulatory Actions. Although some of the securities in the Fund are expected to either have a U.S. government sponsored entity guarantee or be AAA rated by any nationally recognized statistical rating organizations (“NRSRO”), if real estate experiences a significant price decline, this could adversely affect the prices of the securities the Fund owns. In addition, any adverse regulatory action could impact the prices of the securities the Fund owns.
PIA MBS Bond Fund | ETF And Mutual Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] ETF and Mutual Fund Risk. When the MBS Bond 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 that the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
PIA MBS Bond Fund | TBA Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] TBA Securities Risk. In a TBA transaction, a seller agrees to deliver a security at a future date, but does not specify the particular security to be delivered. Instead, the seller agrees to accept any security that meets specified terms. TBA transactions involve the risk that the securities received may have less favorable characteristics than what was anticipated when the Adviser entered into the transaction.
Adviser accounts with TBA securities are also subject to counterparty risk and will be exposed to changes in the value of the underlying investments during the term of the agreement.
PIA MBS Bond Fund | Dollar Roll Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Dollar Roll Risk. Dollar rolls involve the risk that the MBS Bond Fund’s counterparty will be unable to deliver the mortgage-backed securities underlying the dollar roll at the fixed time. If the buyer files for bankruptcy or becomes insolvent, the buyer or its representative may ask for and receive an extension of time to decide whether to enforce the Fund’s repurchase obligation. In addition, the Fund earns interest by investing the transaction proceeds during the roll period. Dollar roll transactions may have the effect of creating leverage in the Fund’s portfolio.
PIA MBS Bond Fund | Portfolio Turnover Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Portfolio Turnover Risk. A high portfolio turnover rate (100% or more) has the potential to result in the realization and distribution to shareholders of higher capital gains, which may subject you to a higher tax liability. A high portfolio turnover rate also leads to higher transactions costs.
PIA MBS Bond Fund | Government-Sponsored Entities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Government-Sponsored Entities Risk. Securities issued or guaranteed by government-sponsored entities, including GNMA, FNMA and FHLMC, may not be guaranteed or insured by the U.S. government and may only be supported by the credit of the issuing agency.
PIA MBS Bond Fund | Asset-Backed Securities Risks Member  
Prospectus [Line Items]  
Risk [Text Block] Asset-Backed Securities Risks. These risks include General Market Risk, Interest Rate Risk, Credit Risk, Prepayment Risk and Extension Risk (each described above). Asset-backed securities may decline in value when defaults on the underlying assets occur and may exhibit additional volatility in periods of changing interest rates.
PIA MBS Bond Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.
PIA High Yield (MACS) Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
PIA High Yield (MACS) Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The High Yield (MACS) Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
PIA High Yield (MACS) Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed-income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
PIA High Yield (MACS) Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other instruments held by the High Yield (MACS) Fund may not be able to make interest or principal payments.
PIA High Yield (MACS) Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
PIA High Yield (MACS) Fund | Derivatives Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Derivatives Risk. Derivatives involve the risk of improper valuation, the risk of ambiguous documentation and the risk that changes in the value of the derivative may not correlate closely with the underlying security. Losses from a derivative instrument may be greater than the amount invested in the derivative instrument. Certain derivatives have the potential for unlimited losses, regardless of the size of the initial investment.
PIA High Yield (MACS) Fund | Risks Associated With Inflation And Deflation Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Inflation and Deflation. Rising cost of living may erode the purchasing power of an investment over time. Deflation risk is the risk that prices throughout the economy decline over time — the opposite of inflation.
PIA High Yield (MACS) Fund | High Yield Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] High Yield Securities Risk. High yield securities (or “junk bonds”) entail greater risk of loss of principal because of their greater exposure to credit risk. High yield securities typically carry higher coupon rates than investment grade securities, but also are considered as speculative and may be subject to greater market price fluctuations, less liquidity and greater risk of loss of income or principal including greater possibility of default and bankruptcy of the issuer of such instruments than more highly rated bonds and loans.
PIA High Yield (MACS) Fund | Foreign And Emerging Market Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Foreign and Emerging Market Securities Risk. Investments in foreign currencies and foreign issuers are subject to additional risks, including political and economic risks, greater volatility, civil conflicts and war, sanctions or other measures by the United States or other governments, liquidity risks, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, expropriation and nationalization risks, and less stringent investor protection and
disclosure standards of foreign markets. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable becoming riskier and more volatile. These risks are magnified in countries in “emerging markets.” Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.
PIA High Yield (MACS) Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the High Yield (MACS) Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial
difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
PIA High Yield (MACS) Fund | ETF And Mutual Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] ETF and Mutual Fund Risk. When the High Yield (MACS) 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 that the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
PIA High Yield (MACS) Fund | Preferred Stock Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Preferred Stock Risk. Preferred stocks may be more volatile than fixed income securities and are more correlated with the issuer’s underlying common stock than fixed income securities. Additionally, the dividend on a preferred stock may be changed or omitted by the issuer.
PIA High Yield (MACS) Fund | Loan Participation And Assignment Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Loan Participation and Assignment Risk. Loan participations and assignments involve special types of risk, including credit risk, interest rate risk, liquidity risk, and the risks of being a lender. Bank loans (i.e., loan participations and assignments), like other high yield corporate debt obligations, have a higher risk of default and may be less liquid and/or become illiquid.
PIA High Yield (MACS) Fund | Rule 144A Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these securities.
PIA High Yield (MACS) Fund | Convertible Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Convertible Securities Risk. Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.
PIA High Yield (MACS) Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.
PIA Short-Term Securities Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
PIA Short-Term Securities Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
PIA Short-Term Securities Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed-income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
PIA Short-Term Securities Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other debt securities held by the Fund may not be able to make interest or principal payments.
PIA Short-Term Securities Fund | Prepayment Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Prepayment Risk. Issuers of securities held by the Fund may be able to prepay principal due on these securities, particularly during periods of declining interest rates. Securities subject to prepayment risk generally offer less potential for gains when interest rates decline, and may offer a greater potential for loss when interest rates rise. When debt obligations are prepaid or when securities are called, the Fund may have to reinvest in securities with a lower yield. Prepayment risk is a major risk of mortgage-backed securities.
PIA Short-Term Securities Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
PIA Short-Term Securities Fund | Risks Associated With Inflation And Deflation Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Inflation and Deflation. Inflation risk is the risk that increasing prices throughout the economy may erode the purchasing power of an investment over time. Deflation risk is the risk that prices throughout the economy decline over time – the opposite of inflation.
PIA Short-Term Securities Fund | High Yield Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] High Yield Securities Risk. Securities with ratings lower than BBB- or Baa3 are known as “high yield” securities (commonly known as “junk bonds”). High yield securities typically carry higher coupon rates than investment grade securities, but also are considered as speculative and may be subject to greater market price fluctuations, less liquidity and greater risk of loss of income or principal including greater possibility of default and bankruptcy of the issuer of such instruments than more highly rated bonds and loans.
PIA Short-Term Securities Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
PIA Short-Term Securities Fund | Extension Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Extension Risk. An issuer may pay principal on an obligation held by the Fund (such as an asset-backed or mortgage-backed security) later than expected. This may happen during a period of rising interest rates. Under these circumstances, the value of the obligation will decrease.
PIA Short-Term Securities Fund | Risks Associated With Mortgage-Backed Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Mortgage-Backed Securities. These include General Market Risk, Interest Rate Risk, Credit Risk, Prepayment Risk and Extension Risk (each described above) as well as the risk that the structure of certain mortgage-backed securities may make their reaction to interest rates and other factors difficult to predict, making their prices very volatile.
PIA Short-Term Securities Fund | ETF And Mutual Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] ETF and Mutual Fund 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 that the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
PIA Short-Term Securities Fund | Rule 144A Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these securities.
PIA Short-Term Securities Fund | U.S. Government Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] U.S. Government Securities Risk. Some U.S. government securities, such as Treasury Bills, notes, and bonds and mortgage-backed securities guaranteed by the Government National Mortgage Association (Ginnie Mae), are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency’s obligations; still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury, their obligations are not supported by the full faith and credit of the U.S. government, and so investments in their securities or obligations issued by them involve greater risk than investments in other types of U.S. government securities. In addition, certain governmental entities have been subject to regulatory scrutiny regarding their accounting policies and practices and other concerns that may result in legislation, changes in regulatory oversight and/or other consequences that could adversely affect the credit quality, availability or investment character of securities issued or guaranteed by these entities.
PIA Short-Term Securities Fund | Risks Associated With Asset-Backed Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with Asset-Backed Securities. These include General Market Risk, Interest Rate Risk, Credit Risk, Prepayment Risk and Extension Risk (each described above). During periods of difficult or frozen credit markets, significant changes in interest rates, or deteriorating economic conditions, such securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid.
PIA Short-Term Securities Fund | Risks Associated With CLOs Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Risks Associated with CLOs. The risks of investing in CLOs include both the economic risks of the underlying loans combined with the risks associated with the CLO structure governing the priority of payments. The degree of such risk will generally correspond to the specific tranche in which the Fund is invested. The Fund intends to invest primarily in AAA-rated tranches; however, this rating does not constitute a guarantee, may be downgraded, and in stressed market environments it is possible that even senior CLO tranches could experience losses due to actual defaults, increased sensitivity to defaults due to collateral default and significant losses experienced by subordinated/equity tranches, market anticipation of defaults, as well as negative market sentiment with respect to CLO securities as an asset class. The Fund’s portfolio management may not be able to accurately predict how specific CLOs or the portfolio of underlying loans for such CLOs will react to changes or stresses in the market, including changes in interest rates. The most common risks associated with investing in CLOs are liquidity risk, interest rate risk, credit risk, prepayment risk, and the risk of default of the underlying asset, among others.
PIA Short-Term Securities Fund | Adjustable Rate And Floating Rate Securities Risks Member  
Prospectus [Line Items]  
Risk [Text Block] Adjustable Rate and Floating Rate Securities Risks. Although the fluctuations in value of adjustable and floating rate instruments should be minimized as a result of changes in market interest rates compared to fixed-rate debt instruments, because such floating rates only reset periodically, changes in prevailing interest rates can still be expected to cause some fluctuation in the value of the Fund.
PIA Short-Term Securities Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.
Institutional Class Prospectus | PIA High Yield Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block]
•Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
Institutional Class Prospectus | PIA High Yield Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
Institutional Class Prospectus | PIA High Yield Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed-income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
Institutional Class Prospectus | PIA High Yield Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other instruments held by the Fund may not be able to make interest or principal payments.
Institutional Class Prospectus | PIA High Yield Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
Institutional Class Prospectus | PIA High Yield Fund | High Yield Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] High Yield Securities Risk. High yield securities (or “junk bonds”) entail greater risk of loss of principal because of their greater exposure to credit risk. High yield securities typically carry higher coupon rates than investment grade securities, but also are considered as speculative and may be subject to greater market price fluctuations, less liquidity and greater risk of loss of income or principal including greater possibility of default and bankruptcy of the issuer of such instruments than more highly rated bonds and loans.
Institutional Class Prospectus | PIA High Yield Fund | Foreign And Emerging Market Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Foreign and Emerging Market Securities Risk. Investments in foreign currencies and foreign issuers are subject to additional risks, including political and economic risks, greater volatility, civil conflicts and war, sanctions or other measures by the United States or other governments, liquidity risks, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, expropriation and nationalization risks, and less stringent investor protection and disclosure standards of foreign markets. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable becoming riskier and more volatile. These risks are magnified in countries in “emerging markets.” Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.
Institutional Class Prospectus | PIA High Yield Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
Institutional Class Prospectus | PIA High Yield Fund | ETF And Mutual Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] ETF and Mutual Fund 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 that the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
Institutional Class Prospectus | PIA High Yield Fund | Preferred Stock Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Preferred Stock Risk. Preferred stocks may be more volatile than fixed income securities and are more correlated with the issuer’s underlying common stock than fixed income securities. Additionally, the dividend on a preferred stock may be changed or omitted by the issuer.
Institutional Class Prospectus | PIA High Yield Fund | Loan Participation And Assignment Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Loan Participation and Assignment Risk. Loan participations and assignments involve special types of risk, including credit risk, interest rate risk, liquidity risk, and the risks of being a lender. Bank loans (i.e., loan participations and assignments), like other high yield corporate debt obligations, have a higher risk of default and may be less liquid and/or become illiquid.
Institutional Class Prospectus | PIA High Yield Fund | Rule 144A Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these securities.
Institutional Class Prospectus | PIA High Yield Fund | Convertible Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Convertible Securities Risk. Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.
Institutional Class Prospectus | PIA High Yield Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.
Class A Prospectus | PIA High Yield Fund | Economic And Market Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Economic and 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); deflation (or expectations for deflation); interest rates; market instability; financial system instability; debt crises and downgrades; embargoes; tariffs; sanctions and other trade barriers; regulatory events; other governmental trade or market control programs and related geopolitical events. In addition, the value of the Fund’s investments may be negatively affected by the occurrence of global events such as war, terrorism, environmental disasters, natural disasters or events, country instability, and infectious disease epidemics or pandemics. The imposition by the U.S. of tariffs on goods imported from foreign countries and reciprocal tariffs levied on U.S. goods by those countries also may lead to volatility and instability in domestic and foreign markets.
Class A Prospectus | PIA High Yield Fund | Management Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Management Risk. The Fund is an actively managed portfolio. The Adviser’s management practices and investment strategies might not work to produce the desired results.
Class A Prospectus | PIA High Yield Fund | Interest Rate Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Interest Rate Risk. The value of the Fund’s investments in fixed income securities will change based on changes in interest rates. If interest rates increase, the value of these investments generally declines. Securities with greater interest rate sensitivity and longer maturities generally are subject to greater fluctuations in value.
Class A Prospectus | PIA High Yield Fund | Credit Risk 1 Member  
Prospectus [Line Items]  
Risk [Text Block] Credit Risk. The issuers of the bonds and other instruments held by the Fund may not be able to make interest or principal payments.
Class A Prospectus | PIA High Yield Fund | Liquidity Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Liquidity Risk. Reduced liquidity in the bond markets can result from a number of events, such as limited trading activity, reductions in bond inventory, and rapid or unexpected changes in interest rates. Less liquid markets could lead to greater price volatility and limit the Fund’s ability to sell a holding at a suitable price.
Class A Prospectus | PIA High Yield Fund | High Yield Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] High Yield Securities Risk. High yield securities (or “junk bonds”) entail greater risk of loss of principal because of their greater exposure to credit risk. High yield securities typically carry higher coupon rates than investment grade securities, but also are considered as speculative and may be subject to greater market price fluctuations, less liquidity and greater risk of loss of income or principal including greater possibility of default and bankruptcy of the issuer of such instruments than more highly rated bonds and loans.
Class A Prospectus | PIA High Yield Fund | Foreign And Emerging Market Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Foreign and Emerging Market Securities Risk. Investments in foreign currencies and foreign issuers are subject to additional risks, including political and economic risks, greater volatility, civil conflicts and war, sanctions or other measures by the United States or other governments, liquidity risks, currency fluctuations, higher transaction costs, delayed settlement, possible foreign controls on investment, expropriation and nationalization risks, and less stringent investor protection and disclosure standards of foreign markets. Events and evolving conditions in certain economies or markets may alter the risks associated with investments tied to countries or regions that historically were perceived as comparatively stable becoming riskier and more volatile. These risks are magnified in countries in “emerging markets.” Emerging market countries typically have less-established market economies than developed countries and may face greater social, economic, regulatory and political uncertainties. In addition, emerging markets typically present greater illiquidity and price volatility concerns due to smaller or limited local capital markets and greater difficulty in determining market valuations of securities due to limited public information on issuers.
Class A Prospectus | PIA High Yield Fund | Counterparty Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Counterparty Risk. Fund transactions involving a counterparty are subject to the risk that the counterparty or a third party will not fulfill its obligation to the Fund. Counterparty risk may arise because of the counterparty’s financial condition (i.e., financial difficulties, bankruptcy, or insolvency), market activities and developments, or other reasons, whether foreseen or not. A counterparty’s inability to fulfill its obligation may result in significant financial loss to the Fund.
Class A Prospectus | PIA High Yield Fund | ETF And Mutual Fund Risk Member  
Prospectus [Line Items]  
Risk [Text Block] ETF and Mutual Fund 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 that the ETF or mutual fund holds. The Fund also will incur brokerage costs when it purchases ETFs.
Class A Prospectus | PIA High Yield Fund | Preferred Stock Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Preferred Stock Risk. Preferred stocks may be more volatile than fixed income securities and are more correlated with the issuer’s underlying common stock than fixed income securities. Additionally, the dividend on a preferred stock may be changed or omitted by the issuer.
Class A Prospectus | PIA High Yield Fund | Loan Participation And Assignment Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Loan Participation and Assignment Risk. Loan participations and assignments involve special types of risk, including credit risk, interest rate risk, liquidity risk, and the risks of being a lender. Bank loans (i.e., loan participations and assignments), like other high yield corporate debt obligations, have a higher risk of default and may be less liquid and/or become illiquid.
Class A Prospectus | PIA High Yield Fund | Rule 144A Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Rule 144A Securities Risk. The market for Rule 144A securities typically is less active than the market for publicly-traded securities. Rule 144A securities carry the risk that the liquidity of these securities may become impaired, making it more difficult for the Fund to sell these securities.
Class A Prospectus | PIA High Yield Fund | Convertible Securities Risk Member  
Prospectus [Line Items]  
Risk [Text Block] Convertible Securities Risk. Convertible securities are subject to the risks of both debt securities and equity securities. The values of convertible securities tend to decline as interest rates rise and, due to the conversion feature, tend to vary with fluctuations in the market value of the underlying common or preferred stock.
Class A Prospectus | PIA High Yield Fund | Risk Lose Money [Member]  
Prospectus [Line Items]  
Risk [Text Block] Losing all or a portion of your investment is a risk of investing in the Fund.