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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 485BPOS
Document Period End Date dei_DocumentPeriodEndDate Oct. 31, 2017
Registrant Name dei_EntityRegistrantName MUTUAL FUND SERIES TRUST
Central Index Key dei_EntityCentralIndexKey 0001355064
Amendment Flag dei_AmendmentFlag false
Trading Symbol dei_TradingSymbol msft
Document Creation Date dei_DocumentCreationDate Nov. 09, 2018
Document Effective Date dei_DocumentEffectiveDate Nov. 09, 2018
Prospectus Date rr_ProspectusDate Nov. 09, 2018
Eventide Limited-Term Bond Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Risk/Return [Heading] rr_RiskReturnHeading <p style="margin: 0px; font-size: 14pt"><b>FUND SUMMARY: Eventide Limited-Term Bond Fund</b></p>
Objective [Heading] rr_ObjectiveHeading <p style="margin: 0px"><b>Investment Objective.</b></p>
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The investment objective of the Eventide Limited-Term Bond Fund (the “Limited-Term Bond Fund” or the “Fund”) is income.
Expense [Heading] rr_ExpenseHeading <p style="margin: 0px"><b>Fees and Expenses of the Fund.</b></p>
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The tables describe the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund. More information about these and other discounts is available from your financial professional and is included in the section of the Fund’s prospectus entitled How to Buy Shares on page 18 and Appendix A – Intermediary-Specific Sales Charge Reductions and Waivers, and in the sections of the Fund’s Statement of Additional Information entitled Reduction of Up-Front Sales Charge on Class A Shares on page [ ], Waivers of Up-Front Sales Charge on Class A Shares on page [ ] and Waiver of Up-Front Sales Charge on T Shares on page [ ].
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption <p style="margin: 0px">Shareholder Fees</p> <p style="margin: 0px">Fees paid directly from your investment</p>
Operating Expenses Caption [Text] rr_OperatingExpensesCaption <p style="margin: 0px"><b>Annual Fund Operating Expenses</b></p> <p style="margin: 0px"><i>Expenses that you pay each year as a percentage of the value of your investment</i></p>
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination Oct. 31, 2020
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading <p style="margin: 0px"><b>Portfolio Turnover.</b></p>
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund’s performance. The portfolio turnover rate for the Predecessor Fund for the fiscal year ended October 31, 2017 was 45%.
Portfolio Turnover, Rate rr_PortfolioTurnoverRate 45.00%
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The total annual fund operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial highlights because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.
Expense Example [Heading] rr_ExpenseExampleHeading <p style="margin: 0px"><b>Example of Hypothetical Fund Costs.</b></p>
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.
Expense Example by, Year, Caption [Text] rr_ExpenseExampleByYearCaption <p style="margin: 0px">The Example assumes that you invest $10,000 in the Fund for the time periods indicated, reinvest dividends and distributions, and then hold or redeem all of your shares at the end of those periods. The Example only accounts for the Fund’s expense limitation through its expiration period, October 31, 2020, and then depicts the Fund’s total expense thereafter. The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p>
Strategy [Heading] rr_StrategyHeading <p style="margin: 0px"><b>Principal Investment Strategies</b></p>
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Limited-Term Bond Fund seeks to achieve its objective through investment in any income-producing securities issued by companies that pass Eventide Asset Management, LLC’s (the Adviser) proprietary screening methodology. Income-producing securities may include corporate bonds, preferred stocks, convertible stocks and investment companies (including open-end funds or exchange traded funds) that may invest in income-producing securities, or in the case of exchange traded funds, track a fixed income index. Under normal market conditions, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes) in bonds. The Fund may invest in securities issued by companies of any size, including what are commonly referred to as small-cap and mid-cap companies (generally those companies with market capitalizations between $300 million and $2 billion and between $2 billion and $5 billion, respectively). The Fund may also invest in inverse ETFs for hedging purposes. Inverse ETFs are designed to provide positive return from a decline in the ETF's underlying benchmark and will be short term in nature.

 

The Adviser analyzes each potential investment’s ability to operate with integrity and create value for customers, employees, and other stakeholders. While few companies may reach these ideals in every area of their business, these principles articulate the Adviser’s ideal characteristics of good corporate behavior. There is no guarantee that the Adviser will be able to successfully screen out all companies that are inconsistent with its principles. The Adviser seeks to invest in companies that reflect the following values:

 

• Respecting the value and freedom of all people; this includes the right to life at all stages and freedom from addictive behaviors caused by gambling, pornography, tobacco and alcohol.

 

• Demonstrating a concern for justice and peace through fair and ethical relationships with customers, suppliers and business partners and through avoidance of products and services that promote weapons production and proliferation.

 

• Promoting family and community; this includes protecting children from violent forms of entertainment and also includes serving low-income communities.

 

• Exhibiting responsible management practices, including fair-dealing with employees, communities, competitors, suppliers and customers as demonstrated by a company’s record regarding litigation, regulatory actions against the company and its record of promoting products and services that improve the lives of people.

 

• Practicing environmental stewardship; this includes practices considered more sustainable than those of industry peers, reduction in environmental impact when compared to previous periods, and/or the use of more efficient and cleaner energy sources.

 

Trinity Fiduciary Partners, LLC (“Trinity”) serves as the Fund’s primary sub-adviser. Trinity provides oversight of Dana Investment Advisors, Inc. ( “Dana”), sub-adviser to the Fund.

 

Dana uses a disciplined, risk-controlled investment process to select the Fund's holdings. Dana employs a relative-value approach to identify securities in the marketplace with the following characteristics, although not all of the securities selected will have these attributes:

 

• Discounted price to potential market value

 

• Improving credit profiles yet unrecognized by the market

 

• Yield advantage relative to its benchmark

 

Dana invests in securities that offer a positive yield advantage over the market and, in its view, have room to increase in price. The sub-adviser may also invest to take advantage of what it believes are temporary disparities in the yield of different segments of the market for securities. Under normal market conditions, the Fund will invest substantially all of its assets in income producing securities (including high-yield high risk or junk bonds) with a focus on U.S. corporate bonds, government bonds, agency bonds, adjustable and fixed rate mortgage bonds, municipal bonds, convertible securities, and debt instruments issued by foreign governments, including those in emerging markets. The Fund may invest up to 20% of its assets in preferred stocks and dividend-paying common stocks. Fixed income investments may be of any maturity or credit quality, but the Fund’s weighted average effective portfolio duration will not exceed five years.

 

In addition to income-producing securities, from time to time the Fund may purchase other securities such as real estate investment trusts ("REITs"), publicly traded partnerships, mainly as an alternative to holding cash prior to investment. Dana may shift the Fund’s assets among various types of income-producing securities based upon changing market conditions.
Strategy Portfolio Concentration [Text] rr_StrategyPortfolioConcentration Under normal market conditions, the Fund will invest at least 80% of its net assets (plus borrowings for investment purposes) in bonds.
Risk [Heading] rr_RiskHeading <p style="margin: 0px"><b>Principal Risks of Investing in the Fund</b></p>
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

As with any mutual fund, there is no guarantee that the Fund will achieve its objective. Investment markets are unpredictable and there will be certain market conditions where the Fund will not meet its investment objective and will lose money. The Fund’s net asset value and returns will vary and you could lose money on your investment in the Fund and those losses could be significant.

 

The following summarizes the principal risks of investing in the Fund. These risks could adversely affect the net asset value, total return and the value of the Fund and your investment.

 

Convertible Security Risk. The market value of convertible securities and other debt securities tends to fall when prevailing interest rates rise. The value of convertible securities also tends to change whenever the market value of the underlying common or preferred stock fluctuates.

 

Credit Risk. Credit risk is the risk that an issuer of a security will fail to pay principal and interest in a timely manner, reducing the Fund’s total return. The Fund may invest in high-yield, high-risk securities, commonly called “junk bonds”, that are not investment grade and are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities.

 

Emerging Market Risk. Emerging market countries may have relatively unstable governments, weaker economies, and less-developed legal systems with fewer security holder rights. Emerging market economies may be based on only a few industries and security issuers may be more susceptible to economic weakness and more likely to default. Emerging market securities also tend to be less liquid.

 

Ethical Investment Risk. The Fund’s ethical values screening criteria could cause it to underperform similar funds that do not have such screening criteria. This could be due to ethically acceptable companies falling out of favor with investors or failing to perform as well as companies that do not meet the Fund’s ethical screening guidelines

 

Foreign Securities Risk. Since the Fund’s investments may include ADRs and foreign securities, the Fund is subject to risks beyond those associated with investing in domestic securities. The value of foreign securities is subject to currency fluctuations. Foreign companies are generally not subject to the same regulatory requirements of U.S. companies thereby resulting in less publicly available information about these companies. In addition, foreign accounting, auditing and financial reporting standards generally differ from those applicable to U.S. companies.

 

Interest Rate Risk. The Fund's share price and total return will vary in response to changes in interest rates. If rates increase, the value of the Fund's investments generally will decline, as will the value of your investment in the Fund.

 

Inverse ETF Risk. Inverse or “short” ETFs seek to deliver returns that are opposite of the return of a benchmark (e.g., if the benchmark goes up by 1%, the ETF will go down by 1%), typically using a combination of derivative strategies. Inverse ETFs contain all of the risks that regular ETFs present. Because inverse ETFs typically seek to obtain their objective on a daily basis, holding inverse ETFs for longer than a day may produce unexpected results particularly when the benchmark index experiences large ups and downs. Inverse ETFs may also be leveraged. Inverse ETFs contain all of the risks that regular ETFs present. Investments in inverse ETFs will prevent the Fund from participating in market-wide or sector-wide gains and may not prove to be an effective hedge. During periods of increased volatility, inverse ETFs may not perform in the manner they are designed

 

Investment Style Risk. The Adviser’s or a sub-adviser's judgments about the attractiveness, value and potential appreciation of particular asset class or individual security in which the Fund invests may prove to be incorrect and there is no guarantee that the Adviser’s or a sub-adviser's judgment will produce the desired results.

 

Junk Bond Risk. Lower-quality bonds, known as “high yield” or “junk” bonds, present greater risk than bonds of higher quality, including an increased risk of default. An economic downturn or period of rising interest rates could adversely affect the market for these bonds and reduce the Fund’s ability to sell its bonds. The lack of a liquid market for these bonds could decrease the Fund’s share price.

 

Liquidity Risk. Liquidity risk exists when particular investments of the Fund would be difficult to purchase or sell, possibly preventing the Fund from selling such illiquid securities at an advantageous time or price, or possibly requiring the Fund to dispose of other investments at unfavorable times or prices in order to satisfy its obligations.

 

Management Risk. The portfolio manager’s judgments about the attractiveness, value and potential appreciation of particular stocks or other securities in which the Fund invests may prove to be incorrect and there is no guarantee that the portfolio manager’s judgment will produce the desired results.

 

Market Risk. Overall stock market risks may also affect the value of the Fund. Factors such as domestic and/or foreign economic growth and market conditions, interest rate levels, political events and terrorism affect the securities markets.

 

Municipal Bond Risk. The value of municipal bonds may fluctuate as a result of changes in the cash flows generated by the revenue source(s), changes in the priority of the municipal obligation to receive the cash flows generated by the revenue source(s), or changes in federal tax laws or the activity of an issuer which may adversely affect the tax-exempt status of municipal bonds.

 

Preferred Stock Risk. Dividends on preferred stocks are generally payable at the discretion of issuer’s board of directors and Fund shareholders may lose money if dividends are not paid. Preferred stock prices may fall if interest rates rise or the issuer’s creditworthiness becomes impaired.

 

REIT Risk. The Fund may invest in REITs. Investing in REITs involves certain unique risks in addition to those risks associated with investing in the real estate industry in general. Equity REITs may be affected by changes in the value of the underlying property owned by the REITs, while mortgage REITs may be affected by the quality of any credit extended.

 

Security Risk. The value of the Fund may decrease in response to the activities and financial prospects of individual securities in the Fund’s portfolio.

 

Small and Mid-Capitalization Stock Risk. To the extent the Fund invests in the stocks of small and mid-sized companies, the Fund may be subject to additional risks, including the risk that earnings and prospects of these companies are more volatile than larger companies.

 

Sovereign Obligation Risk. The Fund may invest in sovereign debt obligations. Investment in sovereign debt obligations involves special risks not present in corporate debt obligations. The issuer of the sovereign debt or the governmental authorities that control the repayment of the debt may be unable or unwilling to repay principal or interest when due, and the Fund may have limited recourse in the event of a default.

 

Underlying Fund Risk. Because the Fund may invest in other investment companies, the value of your investment will fluctuate in response to the performance of the acquired funds. Investing in acquired funds involves certain additional expenses and certain tax results that would not arise if you invested directly in the securities of the acquired funds.

 

U.S. Agency Securities Risk. The Fund may invest in U.S. government or agency obligations. Securities issued or guaranteed by federal agencies and U.S. government sponsored entities may or may not be backed by the full faith and credit of the U.S. government.
Risk Lose Money [Text] rr_RiskLoseMoney As with any mutual fund, there is no guarantee that the Fund will achieve its objective. Investment markets are unpredictable and there will be certain market conditions where the Fund will not meet its investment objective and will lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading <p style="margin: 0px"><b>Performance:</b></p>
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and performance table below show the variability of the Fund’s returns, which is some indication of the risks of investing in the Fund. The bar chart shows performance of the Fund’s Class A shares for each full calendar year since the Fund’s inception. Although Class C, Class N, Class I and Class T shares would have similar annual returns to Class A shares because the classes are invested in the same portfolio of securities, the returns for Class C, Class N, Class I and Class T shares would be different than Class A shares because Class C, Class N, Class I and Class T shares have different expenses than Class A shares. Performance information for Class C, Class N and Class T shares will be included after the share classes have been in operation for one complete calendar year. The performance table compares the performance of the Fund’s Class I shares over time to the performance of a broad-based market index. You should be aware that the Fund’s past performance (before and after taxes) may not be an indication of how the Fund will perform in the future. The Fund acquired all of the assets and liabilities of Epiphany FFV Strategic Income Fund, a series of Epiphany Funds, (the “Predecessor Fund”) in a tax-free reorganization on December 14, 2018. In connection with this acquisition, shares of the Predecessor Fund’s Class A Shares and Class I Shares were exchanged for Class A Shares and Class I Shares of the Fund, respectively. Prior to May 31, 2017, the Predecessor Fund’s Class I shares were called Class C shares, and the fee structure was different. The Predecessor Fund had an investment objective and strategies that were, in all material respects, the same as those of the Fund, and was managed in a manner that, in all material respects, complied with the investment guidelines and restrictions of the Fund. The performance information set forth below reflects the historical performance of the Predecessor Fund shares. Updated performance information will be available at no cost by calling 1-877-771-3836 and on the Fund’s website at www.eventidefunds.com.
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and performance table below show the variability of the Fund's returns, which is some indication of the risks of investing in the Fund.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone 1-877-771-3836
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.eventidefunds.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture You should be aware that the Fund's past performance (before and after taxes) may not be an indication of how the Fund will perform in the future.
Bar Chart [Heading] rr_BarChartHeading <p style="margin: 0px"><b>Annual Total Returns</b></p>
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

During the period shown in the bar chart, the highest return for a quarter was 2.38% (quarter ended March 31, 2012) and lowest return for a quarter was -2.26% (quarter ended December 31, 2016).

 

Prior to May 31, 2017, the Fund’s Class I shares were called Class C shares, and the fee structure was different. Those shares sold before May 31, 2017 were subject to a contingent deferred sales load, which is not reflected in returns set forth in the table below. If the contingent deferred sales load was included, the returns would be less than those shown.

 

For the period December 31, 2017 to June 30, 2018, the Investor Class shares’ total return was (1.03)%. The Fund’s Class A year-to-date return for the period ended September 30, 2018 was (1.42)%.
Year to Date Return, Label rr_YearToDateReturnLabel The Fund's Class A year-to-date return for the period
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Sep. 30, 2018
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn (1.42%)
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel The highest return for a quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 2.38%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest return for a quarter was
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2016
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (2.26%)
Performance Table Heading rr_PerformanceTableHeading <p style="margin: 0px"><b>Average Annual Total Returns</b></p> <p style="margin: 0px"><b>(for the periods ended, December 31, 2017)</b></p>
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes Reflects no deduction for fees, expenses or taxes
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the highest historical individual federal marginal income tax rate and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are only shown for Class A shares. After-tax returns for Class C, Class N, Class I and Class T shares will vary.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

After-tax returns are calculated using the highest historical individual federal marginal income tax rate and do not reflect the impact of state and local taxes. Actual after-tax returns depend on a shareholder’s tax situation and may differ from those shown. After-tax returns are not relevant for shareholders who hold Fund shares in tax-deferred accounts or to shares held by non-taxable entities. After-tax returns are only shown for Class A shares. After-tax returns for Class C, Class N, Class I and Class T shares will vary.
Eventide Limited-Term Bond Fund | Barclays Intermediate Aggregate Index (reflects no deduction for fees, expenses or taxes)  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 2.27%
5 Years rr_AverageAnnualReturnYear05 1.70%
Since Inception rr_AverageAnnualReturnSinceInception 2.51%
Eventide Limited-Term Bond Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 5.75%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00%
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.17%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.03%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.04% [2]
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts on purchases of Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 in the Fund.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 50,000
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 675
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 1,085
Annual Return 2011 rr_AnnualReturn2011 3.65%
Annual Return 2012 rr_AnnualReturn2012 5.55%
Annual Return 2013 rr_AnnualReturn2013 0.42%
Annual Return 2014 rr_AnnualReturn2014 4.50%
Annual Return 2015 rr_AnnualReturn2015 0.32%
Annual Return 2016 rr_AnnualReturn2016 1.10%
Annual Return 2017 rr_AnnualReturn2017 3.30%
Label rr_AverageAnnualReturnLabel Return Before Taxes
1 Year rr_AverageAnnualReturnYear01 (1.86%)
5 Years rr_AverageAnnualReturnYear05 0.88%
Since Inception rr_AverageAnnualReturnSinceInception 2.20%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 28, 2010
Eventide Limited-Term Bond Fund | Class A | Return After Taxes on Distributions  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 (2.75%)
5 Years rr_AverageAnnualReturnYear05 (0.03%)
Since Inception rr_AverageAnnualReturnSinceInception 1.25%
Eventide Limited-Term Bond Fund | Class A | Return After Taxes on Distributions and Sale of Fund Shares  
Prospectus [Line Items] rr_ProspectusLineItems  
1 Year rr_AverageAnnualReturnYear01 (1.02%)
5 Years rr_AverageAnnualReturnYear05 0.26%
Since Inception rr_AverageAnnualReturnSinceInception 1.29%
Eventide Limited-Term Bond Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.17%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.78%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.79% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 182
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 769
Eventide Limited-Term Bond Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.17%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.78%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.79% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 81
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 464
1 Year rr_AverageAnnualReturnYear01 3.08%
5 Years rr_AverageAnnualReturnYear05 1.31%
Since Inception rr_AverageAnnualReturnSinceInception 2.20%
Inception Date rr_AverageAnnualReturnInceptionDate Jul. 28, 2010
Eventide Limited-Term Bond Fund | Class N  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.20%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.17%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.98%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 0.99% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 101
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 525
Eventide Limited-Term Bond Fund | Class T  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 2.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none
Maximum Sales Charge on Reinvested Dividends and Distributions (as a percentage) rr_MaximumSalesChargeOnReinvestedDividendsAndDistributionsOverOther none
Redemption Fee rr_RedemptionFee $ (15)
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 0.60%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 1.17%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01% [1]
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.03%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.99%) [2]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.04% [2]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 353
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 777
[1] Acquired Fund Fees and Expenses are the indirect costs of investing in other investment companies. The total annual fund operating expenses in this fee table will not correlate to the expense ratio in the Fund's financial highlights because the financial statements include only the direct operating expenses incurred by the Fund, not the indirect costs of investing in other investment companies.
[2] The Fund's adviser, Eventide Asset Management, LLC ("Eventide" or the "Adviser") has contractually agreed to waive fees and/or reimburse expenses of the Fund to the extent necessary to limit operating expenses (excluding front-end or contingent deferred loads, taxes, leverage interest, brokerage commissions, expenses incurred in connection with any merger or reorganization, dividend expense on securities sold short, underlying fund fees and expenses or extraordinary expenses such as litigation) at 1.03%, 1.78%, 0.98%, 0.78% and 1.03% for Class A shares, Class C shares, Class N shares, Class I shares and Class T shares, respectively, through October 31, 2020. This agreement may only be terminated by the Trust's Board of Trustees on 60 days' written notice to the Adviser and upon the termination of the Management Agreement between the Trust and the Adviser. Fee waivers and expense reimbursements are subject to possible recoupment by the Adviser from the Fund in future years on a rolling three-year basis (within the three years after the fees have been waived or reimbursed) if such recoupment can be achieved within the lesser of the expense limitation in place at the time of waiver/reimbursement and the expense limitation in place at the time of recapture.