Potomac Defensive Bull Fund | Institutional Class Shares Potomac Defensive Bull Fund | Institutional Class Shares | S&P 500® Index Potomac Defensive Bull Fund | Institutional Class Shares | S&P Target Risk Aggressive Index Investment Type [Axis] iShares Core S&P 500 ETF State Street Institutional U.S. Government Money Market Fund Premier Class BondBloxx Bloomberg Six Month Target Duration US Treasury ETF Exchange Traded Funds [Member] Net Cash Potomac Defensive Bull Fund | Class R Shares Potomac Defensive Bull Fund | Class R Shares | S&P 500® Index Potomac Defensive Bull Fund | Class R Shares | S&P Target Risk Aggressive Index Potomac Managed Volatility Fund | Institutional Class Shares Potomac Managed Volatility Fund | Institutional Class Shares | Bloomberg Global-Aggregate Total Return Index Potomac Managed Volatility Fund | Institutional Class Shares | S&P Target Risk Conservative Index BondBloxx CCC Rated USD High Yield Corporate Bond ETF BondBloxx BB Rated USD High Yield Corporate Bond ETF Vanguard Emerging Markets Government Index Fund ETF Invesco DB US Dollar Index Bullish Fund iShares Fallen Angels USD Bond ETF BondBloxx JP Morgan USD Emerging Markets 1-10 Year Bond ETF Potomac Managed Volatility Fund | Class R Shares Potomac Managed Volatility Fund | Class R Shares | Bloomberg Global-Aggregate Total Return Index Potomac Managed Volatility Fund | Class R Shares | S&P Target Risk Conservative Index Potomac Tactical Opportunities Fund | Institutional Class Shares Potomac Tactical Opportunities Fund | Institutional Class Shares | S&P 500® Index Potomac Tactical Opportunities Fund | Institutional Class Shares | S&P Target Risk Balanced Index iShares 0-3 Month Treasury Bond ETF VanEck Semiconductor ETF iShares Russell 2000 Growth ETF iShares Russell 2000 ETF Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF State Street® SPDR® S&P® Metals & Mining ETF Global X Silver Miners ETF State Street® Energy Select Sector SPDR® ETF Potomac Tactical Opportunities Fund | Class R Shares Potomac Tactical Opportunities Fund | Class R Shares | S&P 500® Index Potomac Tactical Opportunities Fund | Class R Shares | S&P Target Risk Balanced Index Potomac Tactical Rotation Fund | Institutional Class Shares Potomac Tactical Rotation Fund | Institutional Class Shares | S&P 500® Index Potomac Tactical Rotation Fund | Institutional Class Shares | S&P Target Risk Moderate Index Astoria US Equal Weight Quality Kings ETF Vanguard Total Stock Market ETF WisdomTree U.S. Quality Dividend Growth Fund State Street® SPDR® Bloomberg Convertible Securities ETF WisdomTree Japan Hedged Equity Fund Potomac Tactical Rotation Fund | Class R Shares Potomac Tactical Rotation Fund | Class R Shares | S&P 500® Index Potomac Tactical Rotation Fund | Class R Shares | S&P Target Risk Moderate Index Potomac Tactically Passive Fund | Institutional Class Shares State Street® SPDR® Portfolio S&P 500® ETF Potomac Tactically Passive Fund | Class R Shares Net Assets Investment Company, Portfolio Turnover