Catalyst Insider Buying Fund A D Rs Risk [Member] Commodity Risk [Member] Counterparty Risk [Member] Credits Risk [Member] Currency Risk [Member] Derivatives Risk [Member] Duration Risk [Member] Equity Security Risk [Member] Fixed Income Risk [Member] Foreign Exchanges Risk [Member] Foreign Investment Risk [Member] Forwards Risk [Member] Futures Contract Risk [Member] Income Risk [Member] Interest Rate Risks [Member] Large Capitalization Company Risk [Member] Leverage Risk [Member] Liquidity Risk [Member] Management Risk [Member] Market Risk [Member] Medium Mid Capitalization Company Risk [Member] Model And Data Risk [Member] Options Market Risk [Member] Options Risk [Member] Real Estate And R E I T Risk [Member] Regulatory Risk [Member] Sector Exposure Risk [Member] Communications Sector Risk [Member] Healthcare Sector Risk [Member] Technology Sector Risk [Member] Security Risk [Member] Small Capitalization Company Risk [Member] Structured Note Risk [Member] Swaps Risk [Member] Tax Risk [Member] Turnover Rate Risk [Member] U S Government Obligations Risk [Member] Volatility Risk [Member] Wholly Owned Subsidiary Risk [Member] Catalyst Energy Infrastructure Fund Distribution Policy Risk [Member] Energy Sector Risk [Member] M L P And M L P Related Securities Risks [Member] M L P Tax Risk [Member] Nondiversification Risk [Member] Catalyst/MAP Global Equity Fund Catalyst/MAP Global Equity Fund Class A Catalyst/MAP Global Equity Fund Class C Catalyst/MAP Global Equity Fund Class I Catalyst Tactical Allocation Fund Catalyst Tactical Allocation Fund Class A Catalyst Tactical Allocation Fund Class C Catalyst Tactical Allocation Fund Class I Allocation Risk [Member] Mega Capitalization Company Risk [Member] Catalyst Dynamic Alpha Fund Catalyst Dynamic Alpha Fund Class A Catalyst Dynamic Alpha Fund Class C Catalyst Dynamic Alpha Fund Class I Investment Model Risk [Member] Catalyst Systematic Alpha Fund Actively Managed Fund Risk [Member] Convertible Securities Risk [Member] Credit Risks [Member] Forward Contract Risk [Member] Futures Risk [Member] Geographic Concentrations Risk [Member] Junk Bond Risk [Member] Underlying Fund Risk [Member] Catalyst Systematic High Income Fund Catalyst Systematic High Income Fund Class A Catalyst Systematic High Income Fund Class C Catalyst Systematic High Income Fund Class I Call Options Risk [Member] Cash And Cash Equivalents Risk [Member] Hedging Risk [Member] Index Risk [Member] Catalyst Buffered Shield Fund Catalyst Buffered Shield Fund Class A Catalyst Buffered Shield Fund Class C Catalyst Buffered Shield Fund Class I Equity Options Strategy Risk [Member] Exchange Traded Funds E T Fs Risk [Member] Managed Volatility Risk [Member] Short Position Risk [Member] Turnover Risk [Member] Catalyst/Millburn Hedge Strategy Fund Agricultural Sector Risk [Member] Emerging Market Risk [Member] Futures And Forward Contract Risk [Member] Metals Sector Risk [Member] Catalyst Nasdaq-100 Hedged Income Fund Catalyst Nasdaq-100 Hedged Income Fund Class A Catalyst Nasdaq-100 Hedged Income Fund Class C Catalyst Nasdaq-100 Hedged Income Fund Class I Exchange Traded Notes E T Ns Risk [Member] Catalyst/Aspect Enhanced Multi-Asset Fund Catalyst/Aspect Enhanced Multi-Asset Fund Class A Catalyst/Aspect Enhanced Multi-Asset Fund Class C Catalyst/Aspect Enhanced Multi-Asset Fund Class I Cash And Cash Equivalent Risk [Member] Medium Mid Capitalization Stock Risk [Member] Catalyst Insider Income Fund Financials Sector Risk [Member] Catalyst/SMH High Income Fund Catalyst/SMH High Income Fund Class A Catalyst/SMH High Income Fund Class C Catalyst/SMH High Income Fund Class I Lower Quality Debt Risk [Member] Preferred Stock Risk [Member] Consumer Discretionary Sector Risk [Member] Catalyst/SMH Total Return Income Fund Catalyst/SMH Total Return Income Fund Class A Catalyst/SMH Total Return Income Fund Class C Catalyst/SMH Total Return Income Fund Class I Business Development Companies B D C Risk [Member] Foreign Securities Investments Risk [Member] M L P And M L P Related Securities Risk [Member] Catalyst/MAP Global Balanced Fund Catalyst/MAP Global Balanced Fund Class A Catalyst/MAP Global Balanced Fund Class C Catalyst/MAP Global Balanced Fund Class I Emerging Markets Risk [Member] Lower Quality Debt [Member] Catalyst/CIFC Senior Secured Income Fund C L Os Risk [Member] Covenant Lite Obligations Risk [Member] Credit Risk For Floating Rate Loans [Member] Debtor In Possession Loan Risks [Member] Demand For Loans Risk [Member] Equity Securities Incidental To Investments In Loans Risk [Member] Focused Investment Risk [Member] Limited Secondary Market For Floating Rate Loans Risk [Member] Liquidity For Floating Rate Loans Risk [Member] Loan Risk [Member] Prepayment And Extension Risks For Floating Rate Loans [Member] Senior Loan Risk [Member] Short Selling Risk [Member] Valuation Of Loans Risk [Member] Catalyst Enhanced Income Strategy Fund Asset Backed And Mortgage Backed Security Risk [Member] Industry Concentration Risk [Member] Prepayment And Extension Risk [Member] Real Estate Risk [Member] Sub Prime Mortgage Risk [Member] Eventide Gilead Fund Development Stage Company Risk [Member] Ethical Investment Risk [Member] Foreign Securities Risk [Member] Growth Stock Risk [Member] Healthcare And Life Sciences Sector Risk [Member] Industrial Sector Risk [Member] Stock Value Risk [Member] Eventide Healthcare & Life Sciences Fund Eventide Healthcare & Life Sciences Fund Class A Shares Eventide Healthcare & Life Sciences Fund Class C Shares Eventide Healthcare & Life Sciences Fund Class N Shares Eventide Healthcare & Life Sciences Fund Class I Shares Eventide Balanced Fund Eventide Balanced Fund Class A Eventide Balanced Fund Class C Eventide Balanced Fund Class N Eventide Balanced Fund Class I Extension Risk [Member] Prepayments Risk [Member] R E I T Risk [Member] Yieldcos Risk [Member] Eventide Dividend Growth Fund Eventide Dividend Growth Fund Class A Shares Eventide Dividend Growth Fund Class C Shares Eventide Dividend Growth Fund Class N Shares Eventide Dividend Growth Fund Class I Shares Industrials Sector Risk [Member] Eventide Limited-Term Bond Fund Eventide Limited-Term Bond Fund Class A Eventide Limited-Term Bond Fund Class C Eventide Limited-Term Bond Fund Class N Eventide Limited-Term Bond Fund Class I Municipal Bond Risk [Member] Sovereign Debt Risk [Member] Eventide Exponential Technologies Fund Eventide Exponential Technologies Fund Class A Share Eventide Exponential Technologies Fund Class C Share Eventide Exponential Technologies Fund Class N Share Eventide Exponential Technologies Fund Class I Share Investment Style Risk [Member] Non Diversification Risks [Member] Financial Technology Companies Risk [Member] Healthcare Technology And Devices Companies Risk [Member] Information Technology Companies Risk [Member] Internet And Direct Marketing Retail Risk [Member] Eventide Core Bond Fund Eventide Core Bond Fund Class A Shares Eventide Core Bond Fund Class C Shares Eventide Core Bond Fund Class N Shares Eventide Core Bond Fund Class I Shares Eventide Large Cap Focus Fund Eventide Large Cap Focus Fund Class A Eventide Large Cap Focus Fund Class C Eventide Large Cap Focus Fund Class N Eventide Large Cap Focus Fund Class I Semiconductor Industry Risk [Member] Software Industry Risk [Member] M L P And M L P Related Securities [Member] Catalyst Insider Buying Fund Class A Catalyst Insider Buying Fund Class C Catalyst Insider Buying Fund Class I Catalyst Energy Infrastructure Fund Class A Catalyst Energy Infrastructure Fund Class C Catalyst Energy Infrastructure Fund Class I Catalyst Systematic Alpha Fund Class A Catalyst Systematic Alpha Fund Class C Catalyst Systematic Alpha Fund Class I Catalyst/Millburn Hedge Strategy Fund Class A Catalyst/Millburn Hedge Strategy Fund Class C Catalyst/Millburn Hedge Strategy Fund Class C-1 Catalyst/Millburn Hedge Strategy Fund Class I Catalyst Insider Income Fund Class A Catalyst Insider Income Fund Class C Catalyst Insider Income Fund Class I Catalyst/CIFC Senior Secured Income Fund Class A Catalyst/CIFC Senior Secured Income Fund Class C Catalyst/CIFC Senior Secured Income Fund Class C-1 Catalyst/CIFC Senior Secured Income Fund Class I Catalyst Enhanced Income Strategy Fund Class A Catalyst Enhanced Income Strategy Fund Class C Catalyst Enhanced Income Strategy Fund Class I Eventide Gilead Fund Class A Eventide Gilead Fund Class C Eventide Gilead Fund Class N Eventide Gilead Fund Class I S&P 500® Index (reflects no deduction for fees, expenses or taxes) Solactive MLP Infrastructure Index (reflects no deduction for fees, expenses or taxes) MSCI ACWI (reflects no deduction for fees, expenses or taxes) MSCI ACWI Value Index Gross (reflects no deduction for fees, expenses or taxes) Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses or taxes) ICE BofA US Cash Pay High Yield Index (reflects no deduction for fees, expenses or taxes) ICE BofA High Yield U.S. 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Total Return Index