| Form N-CSR Cover | 12 Months Ended |
| Sep. 30, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Mutual Fund Series Trust |
| Entity Central Index Key | 0001355064 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| Shareholder Report | 12 Months Ended |
| Sep. 30, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSR |
| Amendment Flag | false |
| Registrant Name | Mutual Fund Series Trust |
| Entity Central Index Key | 0001355064 |
| Entity Investment Company Type | N-1A |
| Document Period End Date | Sep. 30, 2024 |
| C000125239 | |
| Shareholder Report [Line Items] | |
| Fund Name | Empiric Fund |
| Class Name | Class A |
| Trading Symbol | EMCAX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Empiric Fund for the period of October 1, 2023 to September 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.empiricfunds.com/index.html |
| Additional Information Phone Number | (888) 839-7424 |
| Additional Information Website | https://www.empiricfunds.com/index.html |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class A $245 2.18% |
| Expenses Paid, Amount | $ 245 |
| Expense Ratio, Percent | 2.18% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Empiric Fund - Class A Without Load 25.00% 11.91% 8.34% With Load 17.81% 10.60% 7.70% MSCI U.S. Small Cap Index 25.86% 10.47% 9.40% S&P 500 ® 36.35% 15.98% 13.38% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Sep. 30, 2024 |
| AssetsNet | $ 25,400,497 |
| Holdings Count | Holding | 46 |
| Advisory Fees Paid, Amount | $ 247,609 |
| InvestmentCompanyPortfolioTurnover | 5% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $25,400,497 Number of Portfolio Holdings 46 Advisory Fee $247,609 Portfolio Turnover 5% |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Common Stocks 95.1% Money Market Funds 4.9% |
| C000125240 | |
| Shareholder Report [Line Items] | |
| Fund Name | Empiric Fund |
| Class Name | Class C |
| Trading Symbol | EMCCX |
| Annual or Semi-Annual Statement [Text Block] | This annual shareholder report contains important information about Empiric Fund for the period of October 1, 2023 to September 30, 2024. |
| Shareholder Report Annual or Semi-Annual | Annual Shareholder Report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://www.empiricfunds.com/index.html |
| Additional Information Phone Number | (888) 839-7424 |
| Additional Information Website | https://www.empiricfunds.com/index.html |
| Expenses [Text Block] | What were the Fund’s costs for the last year? (based on a hypothetical $10,000 investment) Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment Class C $328 2.93% |
| Expenses Paid, Amount | $ 328 |
| Expense Ratio, Percent | 2.93% |
| Performance Past Does Not Indicate Future [Text] | The Fund's past performance is not a good predictor of how the Fund will perform in the future. |
| Average Annual Return [Table Text Block] | Average Annual Total Returns 1 Year 5 Years 10 Years Empiric Fund - Class C 24.08% 11.07% 7.53% MSCI U.S. Small Cap Index 25.86% 10.47% 9.40% S&P 500 ® 36.35% 15.98% 13.38% The Fund's past performance is not a good predictor of how the Fund will perform in the future. The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| No Deduction of Taxes [Text Block] | The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares. |
| Material Change Date | Sep. 30, 2024 |
| AssetsNet | $ 25,400,497 |
| Holdings Count | Holding | 46 |
| Advisory Fees Paid, Amount | $ 247,609 |
| InvestmentCompanyPortfolioTurnover | 5% |
| Additional Fund Statistics [Text Block] | Fund Statistics Net Assets $25,400,497 Number of Portfolio Holdings 46 Advisory Fee $247,609 Portfolio Turnover 5% |
| Holdings [Text Block] | Asset Weighting (% of total investments) Value Value Common Stocks 95.1% Money Market Funds 4.9% |
| Shareholder Report, Line Graph (Details) - USD ($) | 12 Months Ended | ||||||||||
| Sep. 30, 2024 | Sep. 30, 2014 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015 | |
| C000125239 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Empiric Fund | ||||||||||
| Account Value | $ 21,005 | $ 9,424 | $ 16,803 | $ 14,557 | $ 19,085 | $ 13,440 | $ 11,965 | $ 14,013 | $ 10,812 | $ 9,129 | $ 8,618 |
| C000125240 | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | Empiric Fund | ||||||||||
| Account Value | $ 20,673 | 10,000 | 16,661 | 14,542 | 19,210 | 13,631 | 12,227 | 14,427 | 11,218 | 9,541 | 9,079 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B13">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | ||||||||||
| Account Value | $ 35,098 | 10,000 | 25,741 | 21,165 | 25,040 | 19,260 | 16,727 | 16,044 | 13,607 | 11,472 | 9,939 |
| S&P 500 Index | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B17">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | ||||||||||
| Account Value | $ 35,098 | $ 10,000 | 25,741 | 21,165 | 25,040 | 19,260 | 16,727 | 16,044 | 13,607 | 11,472 | 9,939 |
| MSCI USA SMALL CAP Net (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI U.S. Small Cap Index | ||||||||||
| Account Value | 24,561 | $ 10,000 | 19,514 | 17,453 | 22,063 | 14,892 | 14,931 | 15,763 | 13,626 | 11,442 | 9,949 |
| MSCI USA SMALL CAP Net (USD) | |||||||||||
| Account Value [Line Items] | |||||||||||
| Line Graph and Table Measure Name | MSCI U.S. Small Cap Index | ||||||||||
| Account Value | $ 24,561 | $ 10,000 | $ 19,514 | $ 17,453 | $ 22,063 | $ 14,892 | $ 14,931 | $ 15,763 | $ 13,626 | $ 11,442 | $ 9,949 |
| Shareholder Report, Average Annual Return (Details) | 12 Months Ended | 60 Months Ended | 120 Months Ended | |
| Sep. 30, 2024 | Sep. 30, 2014 | Sep. 30, 2024 | Sep. 30, 2024 | |
| C000125239 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Empiric Fund | |||
| Average Annual Return, Percent | 17.81% | 10.60% | 7.70% | |
| C000125240 | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | Empiric Fund | |||
| Without Sales Load [Member] | C000125239 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 25% | 11.91% | 8.34% | |
| Without Sales Load [Member] | C000125240 | ||||
| Average Annual Return [Line Items] | ||||
| Average Annual Return, Percent | 24.08% | 11.07% | 7.53% | |
| S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B18">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 13.38% | |
| S&P 500 Index | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | ®</sup> Index" id="sjs-B22">S&P 500<sup style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 12px; font-weight: 700; grid-area: auto; line-height: 0px; margin: 0px; overflow: visible; position: relative; text-align: center;">®</sup> Index | |||
| Average Annual Return, Percent | 36.35% | 15.98% | 13.38% | |
| MSCI USA SMALL CAP Net (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI U.S. Small Cap Index | |||
| Average Annual Return, Percent | 25.86% | 10.47% | 9.40% | |
| MSCI USA SMALL CAP Net (USD) | ||||
| Average Annual Return [Line Items] | ||||
| Line Graph and Table Measure Name | MSCI U.S. Small Cap Index | |||
| Average Annual Return, Percent | 25.86% | 10.47% | 9.40% | |
| Shareholder Report, Holdings (Details) | Sep. 30, 2024 |
| C000125239 | 191098102 | Coca-Cola Consolidated, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000125239 | 911363109 | United Rentals, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000125239 | 00847J105 | Agilysys, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000125239 | 303250104 | Fair Isaac Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000125239 | 204166102 | CommVault Systems, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000125239 | 74762E102 | Quanta Services, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000125239 | 50212V100 | LPL Financial Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000125239 | 147528103 | Casey's General Stores, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000125239 | 533900106 | Lincoln Electric Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000125239 | 770323103 | Robert Half International, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000125239 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000125239 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000125239 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000125239 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000125239 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| C000125239 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000125239 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000125239 | Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.20% |
| C000125239 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.50% |
| C000125239 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 95.10% |
| C000125239 | InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
| C000125240 | 191098102 | Coca-Cola Consolidated, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.80% |
| C000125240 | 911363109 | United Rentals, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000125240 | 00847J105 | Agilysys, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000125240 | 303250104 | Fair Isaac Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.70% |
| C000125240 | 204166102 | CommVault Systems, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000125240 | 74762E102 | Quanta Services, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4% |
| C000125240 | 50212V100 | LPL Financial Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| C000125240 | 147528103 | Casey's General Stores, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| C000125240 | 533900106 | Lincoln Electric Holdings, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000125240 | 770323103 | Robert Half International, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.60% |
| C000125240 | Communications | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.40% |
| C000125240 | Materials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| C000125240 | Energy | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.70% |
| C000125240 | Consumer Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.30% |
| C000125240 | Financials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.10% |
| C000125240 | Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 11.90% |
| C000125240 | Health Care | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000125240 | Technology | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25.20% |
| C000125240 | Industrials | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 26.50% |
| C000125240 | InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 95.10% |
| C000125240 | InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.90% |
