Document Information, Document [Axis] Class A Legal Entity [Axis] U.S. Government Money Market Portfolio Share Class [Axis] Class A Health & Biotechnology Portfolio Class A Performance Measure [Axis] Return After Taxes on Distributions Return After Taxes on Distributions and Sale of Portfolio Shares Mid Capitalization Portfolio Class A Technology & Communications Portfolio Class A Investment Quality Bond Portfolio Class A Municipal Bond Portfolio Class A Large Capitalization Value Portfolio Class A Large Capitalization Growth Portfolio Class A Small Capitalization Portfolio Class A International Equity Portfolio Class A Financial Services Portfolio Class A Energy & Basic Materials Portfolio Class A Class C Class C Class C Class C Class C Class C Class C Class C Class C Class C Class C Class C Class C Class I Class I Class I Class I Class I Class I Class I Class I Class I Class I Class I Class I Class I Class A, Class C, Class I James Alpha Macro Portfolio Class I Shares Class A Shares Class C Shares James Alpha Global Real Estate Investments Portfolio Class I Shares Class A Shares Class C Shares James Alpha Multi Strategy Alternative Income Portfolio Class I Shares Class A Shares Class C Shares James Alpha Managed Risk Domestic Equity Portfolio Class A Class C James Alpha Managed Risk Emerging Markets Equity Portfolio Class I Class A Class C James Alpha Hedged High Income Portfolio Class A Shares Class C Shares Class I Shares Class S Class S Shares Class S Shares Class S Shares Class S Shares Class I Class S Shares Class S Shares 90 Day T-Bills Index: (Reflects no deduction for fees, expenses or taxes) Lipper U.S. Treasury Money Market Index Barclays Intermediate U.S. Government/Credit Bond Index (Reflects no deduction for fees, expenses or taxes) Lipper Short-Intermediate Investment Grade Debt Funds Index (Reflects no deduction for fees, expenses or taxes) Barclays Municipal Bond Index (Reflects no deduction for fees, expenses or taxes) Lipper Intermediate Municipal Debt Funds Index (Reflects no deduction for fees, expenses or taxes) S&P 500 / Citigroup Value Index (Reflects no deduction for fees, expenses or taxes) Morningstar Large Value Average (Reflects no deduction for fees, expenses or taxes) S&P 500 / Citigroup Growth Index (Reflects no deduction for fees, expenses or taxes) Morningstar Large Growth Average (Reflects no deduction for fees, expenses or taxes) Russell Midcap Index (Reflects no deduction for fees, expenses or taxes) Morningstar Mid Capitalization Blend Average (Reflects no deduction for fees, expenses or taxes) Russell 2000 Index (Reflects no deduction for fees, expenses or taxes) Morningstar Small Blend Average (Reflects no deduction for fees, expenses or taxes) MSCI ACWI EX-USA Index (Reflects no deduction for fees, expenses or taxes) Morningstar Foreign Large Blend Average (Reflects no deduction for fees, expenses or taxes) S&P 500 Total Return Index (Reflects no deduction for fees, expenses or taxes) S&P 500 Healthcare Index (Reflects no deduction for fees, expenses or taxes) Lipper Science & Technology Funds Index (Reflects no deduction for fees, expenses or taxes) Lipper Financial Services Funds Index (Reflects no deduction for fees, expenses or taxes) Lipper Natural Resources Funds Index (Reflects no deduction for fees, expenses or taxes) Bloomberg Barclays Global Aggregate Total Return Index (Value Unhedged USD) (reflects no deduction for fees, expenses or taxes) Bank of America Merrill Lynch 3-Month Treasury Bill Index (reflects no deduction for fees, expenses or taxes) FTSE EPRA/NAREIT Developed Real Estate Index (reflects no deduction for fees, expenses or taxes) Russell 2000 Total Index (Reflects no deduction for fees, expenses or taxes) S&P 500 Index (Reflects no deduction for fees, expenses or taxes) Morningstar US Fund Long-Short Equity MSCI Emerging Markets Net Index (reflects no deduction for fees, expenses or taxes) Morningstar US Fund Diversified Emerging Markets Bloomberg Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) Prospectus: [Table] Prospectus [Line Items] Document Type Document Period End Date Registrant Name Central Index Key Amendment Flag Amendment Description Trading Symbol Document Creation Date Document Effective Date Prospectus Date Risk/Return [Heading] Objective [Heading] Objective, Primary [Text Block] Objective, Secondary [Text Block] Expense [Heading] Expense Narrative [Text Block] Shareholder Fees Caption [Text] Shareholder Fees Column [Text] Maximum Cumulative Sales Charge (as a percentage of Offering Price) Maximum Cumulative Sales Charge (as a percentage) Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage of Offering Price) Maximum Deferred Sales Charge (as a percentage) Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) Redemption Fee (as a percentage of Amount Redeemed) Redemption Fee Exchange Fee (as a percentage of Amount Redeemed) Exchange Fee Maximum Account Fee (as a percentage of Assets) Maximum Account Fee Shareholder Fee, Other Operating Expenses Caption [Text] Operating Expenses Column [Text] Management Fees (as a percentage of Assets) Distribution and Service (12b-1) Fees Distribution or Similar (Non 12b-1) Fees Component1 Other Expenses Component2 Other Expenses Component3 Other Expenses Other Expenses (as a percentage of Assets): Acquired Fund Fees and Expenses Expenses (as a percentage of Assets) Fee Waiver or Reimbursement Net Expenses (as a percentage of Assets) Fee Waiver or Reimbursement over Assets, Date of Termination Portfolio Turnover [Heading] Portfolio Turnover [Text Block] Portfolio Turnover, Rate Expense Footnotes [Text Block] Expenses Deferred Charges [Text Block] Expenses Range of Exchange Fees [Text Block] Expense Breakpoint Discounts [Text] Expense Breakpoint, Minimum Investment Required [Amount] Expense Exchange Traded Fund Commissions [Text] Expenses Represent Both Master and Feeder [Text] Expenses Explanation of Nonrecurring Account Fee [Text] Other Expenses, New Fund, Based on Estimates [Text] Acquired Fund Fees and Expenses, Based on Estimates [Text] Expenses Other Expenses Had Extraordinary Expenses Been Included [Text] Expenses Restated to Reflect Current [Text] Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] Expense Example [Heading] Expense Example by Year [Heading] Expense Example Narrative [Text Block] Expense Example by, Year, Caption [Text] Expense Example, with Redemption, 1 Year Expense Example, with Redemption, 3 Years Expense Example, with Redemption, 5 Years Expense Example, with Redemption, 10 Years Expense Example, No Redemption Narrative [Text Block] Expense Example, No Redemption, By Year, Caption [Text] Expense Example, No Redemption, 1 Year Expense Example, No Redemption, 3 Years Expense Example, No Redemption, 5 Years Expense Example, No Redemption, 10 Years Expense Example Footnotes [Text Block] Expense Example Closing [Text Block] Strategy [Heading] Strategy Narrative [Text Block] Strategy Portfolio Concentration [Text] Risk [Heading] Risk Narrative [Text Block] Risk Footnotes [Text Block] Risk Closing [Text Block] Risk Lose Money [Text] Risk Nondiversified Status [Text] Risk Money Market Fund [Text] Risk Not Insured Depository Institution [Text] Risk Caption Risk Column [Text] Risk [Text] Bar Chart and Performance Table [Heading] Performance Narrative [Text Block] Performance Information Illustrates Variability of Returns [Text] Performance One Year or Less [Text] Performance Additional Market Index [Text] Performance Availability Phone [Text] Performance Availability Website Address [Text] Performance Past Does Not Indicate Future [Text] Bar Chart [Heading] Bar Chart Narrative [Text Block] Bar Chart Does Not Reflect Sales Loads [Text] Annual Return Caption [Text] Annual Return, Column [Text] Annual Return, Inception Date Annual Return 1990 Annual Return 1991 Annual Return 1992 Annual Return 1993 Annual Return 1994 Annual Return 1995 Annual Return 1996 Annual Return 1997 Annual Return 1998 Annual Return 1999 Annual Return 2000 Annual Return 2001 Annual Return 2002 Annual Return 2003 Annual Return 2004 Annual Return 2005 Annual Return 2006 Annual Return 2007 Annual Return 2008 Annual Return 2009 Annual Return 2010 Annual Return 2011 Annual Return 2012 Annual Return 2013 Annual Return 2014 Annual Return 2015 Annual Return 2016 Annual Return 2017 Annual Return 2018 Annual Return 2019 Annual Return 2020 Bar Chart Footnotes [Text Block] Bar Chart Closing [Text Block] Bar Chart, Reason Selected Class Different from Immediately Preceding Period [Text] Bar Chart, Returns for Class Not Offered in Prospectus [Text] Year to Date Return, Label Bar Chart, Year to Date Return, Date Bar Chart, Year to Date Return Highest Quarterly Return, Label Highest Quarterly Return, Date Highest Quarterly Return Lowest Quarterly Return, Label Lowest Quarterly Return, Date Lowest Quarterly Return Performance Table Heading Performance Table Does Reflect Sales Loads Performance Table Market Index Changed Index No Deduction for Fees, Expenses, Taxes [Text] Performance Table Uses Highest Federal Rate Performance Table Not Relevant to Tax Deferred Performance Table One Class of after Tax Shown [Text] Performance Table Explanation after Tax Higher Performance Table Narrative Performance Table Footnotes, Reason Performance Information for Class Different from Immediately Preceding Period [Text] Performance Table Footnotes Performance Table Closing [Text Block] Caption Column Label 1 Year 5 Years 10 Years Since Inception Inception Date Money Market Seven Day Yield, Caption [Text] Money Market Seven Day Yield Column [Text] Money Market Seven Day Yield Phone Money Market Seven Day Yield Money Market Seven Day Tax Equivalent Yield Thirty Day Yield Caption Thirty Day Yield Column [Text] Thirty Day Yield Phone Thirty Day Yield Thirty Day Tax Equivalent Yield Shareholder Fees [Table] Annual Fund Operating Expenses [Table] Expense Example, With Redemption [Table] Expense Example, No Redemption [Table] Bar Chart [Table] Performance [Table] Market Index Performance [Table] Maximum Sales Charge on Purchases of Shares (as a % of offering price) Sales Charge on Reinvested Dividends (as a % of offering price) Maximum Contingent Deferred Sales Charge (as a % of offering price) Redemption Fee on Shares Held 30 days or Less (as a percentage of Amount Redeemed) Exchange Fee Management Fees Distribution and/or Service (12b-1) Fees Other Expenses Total Annual Portfolio Operating Expenses Distribution and/or Service Rule 12b-1 Fees Other Fund Expenses Expenses of the Subsidiary Interest Expense Total Annual Portfolio Operating Expenses (before Expense Reduction/ Reimbursement) Expense Reduction/ Reimbursement Total Annual Portfolio Operating Expenses (after Expense Reduction/ Reimbursement) (2) Expense Reduction/ Reimbursement Other Expenses Interest Payments and Fees on Borrowed Funds Other Operating Expenses Total of Other Expenses Expense Example, By Year, Column [Text] 1 Year 3 Years 5 Years 10 Years Expense Example, No Redemption, By Year, Column [Text] 1 Year 3 Years 5 Years 10 Years Life of Portfolio Risk/Return: Risk/Return Detail [Table] U.S. Government Money Market Portfolio Class A U.S. Government Money Market Portfolio Class I U.S. Government Money Market Portfolio Class C Health & Biotechnology Portfolio Class I Health & Biotechnology Porfolio Class C Health & Biotechnology Portfolio Class A Mid Capitalization Portfolio - Class I Mid Capitalization Portfolio - Class C Mid Capitalization Portfolio - Class A Technology & Communications Portfolio Class I Technology & Communications Portfolio Class C Technology & Communications Portfolio Class A Investment Quality Bond Portfolio Class A Investment Quality Bond Portfolio Class I Investment Quality Bond Portfolio Class C Municipal Bond Portfolio Class A Municipal Bond Portfolio Class I Municipal Bond Portfolio Class C Large Capitalization Value Portfolio Class A Large Capitalization Value Portfolio Class I Large Capitalization Value Portfolio Class C Large Capitalization Growth Portfolio Class A Large Capitalization Growth Portfolio Class I Large Capitalization Growth Portfolio Class C Small Capitalization Portfolio Class A Small Capitalization Portfolio Class I Small Capitalization Portfolio Class C International Equity Portfolio Class A International Equity Portfolio Class I International Equity Portfolio Class C Financial Services Portfolio Class I Financial Services Portfolio Class C Financial Services Portfolio Class A Energy & Basic Materials Class I Energy & Basic Materials Class C Energy & Basic Materials Class A James Alpha Macro Portfolio Class I Shares James Alpha Macro Portfolio Class A Shares James Alpha Macro Portfolio Class C Shares James Alpha Macro Portfolio Class S Shares James Alpha Global Real Estate Investments Portfolio Class I Shares James Alpha Global Real Estate Investments Portfolio Class A Shares James Alpha Global Real Estate Investments Portfolio Class C Shares James Alpha Global Real Estate Investments Portfolio Class S Shares James Alpha Multi Strategy Alternative Income Portfolio Class I Shares James Alpha Multi Strategy Alternative Income Portfolio Class A Shares James Alpha Multi Strategy Alternative Income Portfolio Class C Shares James Alpha Multi Strategy Alternative Income Portfolio Class S Shares James Alpha Managed Risk Domestic Equity Portfolio Class I James Alpha Managed Risk Domestic Equity Portfolio Class A James Alpha Managed Risk Domestic Equity Portfolio Class C James Alpha Managed Risk Domestic Equity Portfolio Class S Shares James Alpha Managed Risk Emerging Markets Equity Portfolio Class I James Alpha Managed Risk Emerging Markets Equity Portfolio Class A James Alpha Managed Risk Emerging Markets Equity Portfolio Class C James Alpha Managed Risk Emerging Markets Equity Portfolio Class S Shares James Alpha Hedged High Income Portfolio Class S Shares S&P 500/Citigroup Value Index (Reflects no deduction for fees, expenses or taxes) S&P 500/Citigroup Growth Index (Reflects no deduction for fees, expenses or taxes) Class A [Member] U.S. Government Money Market Portfolio U.S. Government Money Market Portfolio Class A Health & Biotechnology Portfolio Health & Biotechnology Portfolio Class A Mid Capitalization Portfolio Mid Capitalization Portfolio - Class A Technology & Communications Portfolio Technology & Communications Portfolio Class A Investment Quality Bond Portfolio Investment Quality Bond Portfolio Class A Municipal Bond Portfolio Municipal Bond Portfolio Class A Large Cap Value Portfolio Large Cap Value Portfolio Class A Large Capitalization Growth Portfolio Large Capitalization Growth Portfolio Class A Small Capitalization Portfolio Small Capitalization Portfolio Class A International Equity Portfolio International Equity Portfolio Class A Financial Services Portfolio Financial Services Portfolio Class A Energy & Basic Materials Energy & Basic Materials Class A Class C [Member] U.S. Government Money Market Portfolio Class C Health & Biotechnology Porfolio Class C Mid Capitalization Portfolio - Class C Technology & Communications Portfolio Class C Investment Quality Bond Portfolio Class C Municipal Bond Portfolio Class C Large Cap Value Portfolio Class C Large Capitalization Growth Portfolio Class C Small Capitalization Portfolio Class C International Equity Portfolio Class C Financial Services Portfolio Class C Energy & Basic Materials Class C Class i [Member] U.S. Government Money Market Portfolio Class I Health & Biotechnology Portfolio Class I Mid Capitalization Portfolio - Class I Technology & Communications Portfolio Class I Investment Quality Bond Portfolio Class I Municipal Bond Portfolio Class I Large Cap Value Portfolio Class I Large Capitalization Growth Portfolio Class I Small Capitalization Portfolio Class I International Equity Portfolio Class I Financial Services Portfolio Class I Energy & Basic Materials Class I Class A, Class C and Class I [Member] James Alpha Macro Portfolio James Alpha Macro Portfolio Class I Shares James Alpha Macro Portfolio Class A Shares James Alpha Macro Portfolio Class C Shares James Alpha Global Real Estate Investments Portfolio James Alpha Global Real Estate Investments Portfolio Class I Shares James Alpha Global Real Estate Investments Portfolio Class A Shares James Alpha Global Real Estate Investments Portfolio Class C Shares James Alpha Multi Strategy Alternative Income Portfolio James Alpha Multi Strategy Alternative Income Portfolio Class I Shares James Alpha Multi Strategy Alternative Income Portfolio Class A Shares James Alpha Multi Strategy Alternative Income Portfolio Class C Shares James Alpha Managed Risk Domestic Equity Portfolio James Alpha Managed Risk Domestic Equity Portfolio Class A James Alpha Managed Risk Domestic Equity Portfolio Class C James Alpha Managed Risk Emerging Markets Equity Portfolio James Alpha Managed Risk Emerging Markets Equity Portfolio Class I James Alpha Managed Risk Emerging Markets Equity Portfolio Class A James Alpha Managed Risk Emerging Markets Equity Portfolio Class C James Alpha Hedged High Income Portfolio James Alpha Hedged High Income Portfolio Class A Shares James Alpha Hedged High Income Portfolio Class C Shares James Alpha Hedged High Income Portfolio Class I Shares Class S [Member] James Alpha Macro Portfolio Class S Shares James Alpha Global Real Estate Investments Portfolio Class S Shares James Alpha Multi Strategy Alternative Income Portfolio Class S Shares James Alpha Managed Risk Domestic Equity Portfolio Class S Shares James Alpha Managed Risk Emerging Markets Equity Portfolio Class S Shares James Alpha Hedged High Income Portfolio Class S Shares 90 Day T-Bills Index: (Reflects no deduction for fees, expenses or taxes) Lipper U.S. Treasury Money Market Index: (Reflects no deduction for fees, expenses or taxes) Barclays Intermediate U.S. Government/Credit Bond Index (Reflects no deduction for fees, expenses or taxes) Lipper Short-Intermediate Investment Grade Debt Funds Index (Reflects no deduction for fees, expenses or taxes) Barclays Municipal Bond Index (Reflects no deduction for fees, expenses or taxes) Lipper Intermediate Municipal Debt Funds Index (Reflects no deduction for fees, expenses or taxes) S&P 500/Citigroup Value Index (Reflects no deduction for fees, expenses or taxes) Morningstar Large Value Average (Reflects no deduction for fees, expenses or taxes) Morningstar Large Growth Average (Reflects no deduction for fees, expenses or taxes) Russell Midcap Index (Reflects no deduction for fees, expenses or taxes) Morningstar Mid Capitalization Blend Average (Reflects no deduction for fees, expenses or taxes) Russell 2000 Index (Reflects no deduction for fees, expenses or taxes) Morningstar Small Blend Average (Reflects no deduction for fees, expenses or taxes) MSCI ACWI EX-USA Index (Reflects no deduction for fees, expenses or taxes) Morningstar Foreign Large Blend Average (Reflects no deduction for fees, expenses or taxes) S&P 500 Total Return Index (Reflects no deduction for fees, expenses or taxes) S&P 500 Healthcare Index (Reflects no deduction for fees, expenses or taxes) Lipper Science & Technology Funds Index (Reflects no deduction for fees, expenses or taxes) Lipper Financial Services Funds Index (Reflects no deduction for fees, expenses or taxes) Lipper Natural Resources Funds Index (Reflects no deduction for fees, expenses or taxes) S&P 500/Citigroup Growth Index (Reflects no deduction for fees, expenses or taxes) Bloomberg Barclays Global Aggregate Total Return Index (Value Unhedged USD) (reflects no deduction for fees, expenses or taxes) Bank of America Merrill Lynch 3-Month Treasury Bill Index (reflects no deduction for fees, expenses or taxes) FTSE EPRA/NAREIT Developed Real Estate Index (reflects no deduction for fees, expenses or taxes) Russell 2000 Total Index (Reflects no deduction for fees, expenses or taxes) James Alpha Managed Risk Domestic Equity Portfolio Class I S&P 500 Index (Reflects no deduction for fees, expenses or taxes) Morningstar US Fund Long-Short Equity MSCI Emerging Markets Net Index (reflects no deduction for fees, expenses or taxes) Morningstar US Fund Diversified Emerging Markets Bloomberg Barclays Capital U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) C000169727Member C000169728Member C000169729Member