| Form N-CSR Cover | 6 Months Ended |
| May 31, 2024 | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | OCM Mutual Fund |
| Entity Central Index Key | 0000745338 |
| Document Period End Date | May 31, 2024 |
| Shareholder Report | 6 Months Ended |
| May 31, 2024 USD ($) Holding | |
| Shareholder Report [Line Items] | |
| Document Type | N-CSRS |
| Amendment Flag | false |
| Registrant Name | OCM Mutual Fund |
| Entity Central Index Key | 0000745338 |
| Document Period End Date | May 31, 2024 |
| C000014470 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | OCM Gold Fund |
| Class Name | Investor Class |
| Trading Symbol | OCMGX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the OCM Gold Fund (“Fund”) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://ocmgoldfund.com |
| Additional Information Phone Number | 1-800-628-9403 |
| Additional Information Website | https://ocmgoldfund.com |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage OCM Gold Fund $ 2.48 % |
| Expenses Paid, Amount | $ 136 |
| Expense Ratio, Percent | 2.48% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Over the six-month fiscal period ending May 31, 2024, the OCM Gold Fund’s Investor Class gained 19.88% (14.50% after maximum sales load) compared to a 22.79% increase in the Philadelphia Gold and Silver Index (“XAU”) and a 16.35% gain for the S&P 500 Index. The price of gold bullion closed the six-month fiscal period at $2,345.80 based on the London PM Fix up 13.48% for the six-month fiscal period ending May 31, 2024. The OCM Gold Fund’s investment strategy is to invest across all market capitalization sectors of the gold and silver mining industry, including major, intermediate, and junior producers along with exploration and development companies. This strategy has led to the Fund’s outperformance of the XAU over longer periods but fell slightly short over the six-month fiscal period ending May 31, 2024. TOP PERFORMANCE CONTRIBUTORS Aya Gold & Silver, Inc. Agnico Eagle Mines Ltd. Jaguar Mining, Inc. Alamos Gold, Inc. TOP PERFORMANCE DETRACTORS SSR Mining, Inc. B2Gold Corp. Endeavour Mining PLC Barrick Gold Corp. |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund. It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 6 Months 1 Year 5 Years 10 Years OCM Gold Fund (Investor Class/OCMGX) 14.50 % 15.05 % 14.51 % 6.54 % OCM Gold Fund (Investor Class/OCMGX)—excluding sales load 19.88 % 20.48 % 15.58 % 7.03 % S&P 500 Index 16.35 % 28.19 % 15.80 % 12.69 % Philadelphia Gold & Silver Index 22.79 % 24.48 % 18.22 % 7.08 % |
| 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. |
| Updated Performance Information Location [Text Block] | Visit https://ocmgoldfund.com |
| Net Assets | $ 57,500,000 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 236,897 |
| Investment Company Portfolio Turnover | 0% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ % Total number of portfolio holdings $ % Total advisory fee paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Industry Allocation exclude short-term holdings, if any. Top Ten Holdings Aya Gold & Silver, Inc. 12.6 % Alamos Gold, Inc. 8.7 % Agnico Eagle Mines Ltd. 7.7 % Wheaton Precious Metals Corp. 7.6 % Barrick Gold Corp. 6.0 % Wesdome Gold Mines Ltd. 5.9 % Jaguar Mining, Inc. 5.5 % Newmont Corp. 4.7 % Endeavour Mining PLC 4.5 % AngloGold Ashanti Ltd. ADR 4.2 % INVESTMENTS BY COUNTRY Industry Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Aya Gold & Silver, Inc. 12.6 % Alamos Gold, Inc. 8.7 % Agnico Eagle Mines Ltd. 7.7 % Wheaton Precious Metals Corp. 7.6 % Barrick Gold Corp. 6.0 % Wesdome Gold Mines Ltd. 5.9 % Jaguar Mining, Inc. 5.5 % Newmont Corp. 4.7 % Endeavour Mining PLC 4.5 % AngloGold Ashanti Ltd. ADR 4.2 % |
| Material Fund Change [Text Block] | Material Fund Changes The Fund did not have any material changes that occurred since the beginning of the reporting period. |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| C000101831 [Member] | |
| Shareholder Report [Line Items] | |
| Fund Name | OCM Gold Fund |
| Class Name | Atlas Class |
| Trading Symbol | OCMAX |
| Annual or Semi-Annual Statement [Text Block] | This semi-annual shareholder report contains important information about the OCM Gold Fund (“Fund”) for the period of December 1, 2023 to May 31, 2024. |
| Shareholder Report Annual or Semi-Annual | semi-annual shareholder report |
| Additional Information [Text Block] | You can find additional information about the Fund at https://ocmgoldfund.com |
| Additional Information Phone Number | 1-800-628-9403 |
| Additional Information Website | https://ocmgoldfund.com |
| Expenses [Text Block] | Fund Expenses (Based on a hypothetical $10,000 investment) Fund (Class) Costs of a $10,000 investment Costs paid as a percentage OCM Gold Fund $ 1.98 % |
| Expenses Paid, Amount | $ 109 |
| Expense Ratio, Percent | 1.98% |
| Factors Affecting Performance [Text Block] | Management’s Discussion of Fund Performance SUMMARY OF RESULTS Over the six-month fiscal period ending May 31, 2024, the OCM Gold Fund’s Atlas Class gained 20.21%, compared to a 22.79% increase in the Philadelphia Gold and Silver Index (“XAU”) and a 16.35% gain for the S&P 500 Index. The price of gold bullion closed the six-month fiscal period at $2,345.80 based on the London PM Fix up 13.48% for the six-month fiscal period ending May 31, 2024. The OCM Gold Fund’s investment strategy is to invest across all market capitalization sectors of the gold and silver mining industry, including major, intermediate, and junior producers along with exploration and development companies. This strategy has led to the Fund’s outperformance of the XAU over longer periods but fell slightly short over the six-month fiscal period ending May 31, 2024. TOP PERFORMANCE CONTRIBUTORS Aya Gold & Silver, Inc. Agnico Eagle Mines Ltd. Jaguar Mining, Inc. Alamos Gold, Inc. TOP PERFORMANCE DETRACTORS SSR Mining, Inc. B2Gold Corp. Endeavour Mining PLC Barrick Gold Corp. |
| Performance Past Does Not Indicate Future [Text] | Keep in mind that the Fund’s past performance is not a good predictor of how the Fund will perform in the future. |
| Line Graph [Table Text Block] | Fund Performance The following graph and chart compare the initial and subsequent account values at the end of each of the most recently completed 10 fiscal years of the Fund. It assumes a $10,000 initial investment at the beginning of the first fiscal year in an appropriate, broad-based securities market index for the same period. GROWTH OF $10,000 |
| Average Annual Return [Table Text Block] | AVERAGE ANNUAL TOTAL RETURN 6 Months 1 Year 5 Years 10 Years OCM Gold Fund (Atlas Class/OCMAX)—excluding sales load 20.21 % 21.16 % 16.34 % 7.79 % S&P 500 Index 16.35 % 28.19 % 15.80 % 12.69 % Philadelphia Gold & Silver Index 22.79 % 24.48 % 18.22 % 7.08 % |
| 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. |
| Updated Performance Information Location [Text Block] | Visit https://ocmgoldfund.com |
| Net Assets | $ 57,500,000 |
| Holdings Count | Holding | 39 |
| Advisory Fees Paid, Amount | $ 236,897 |
| Investment Company Portfolio Turnover | 0% |
| Additional Fund Statistics [Text Block] | Key Fund Statistics The following table outlines key fund statistics that you should pay attention to. Fund net assets $ % Total number of portfolio holdings $ % Total advisory fee paid $ % Portfolio turnover rate as of the end of the reporting period $ % |
| Holdings [Text Block] | Graphical Representation of Holdings The tables below show the investment makeup of the Fund, representing percentage of the total net assets of the Fund. The Top Ten Holdings and Industry Allocation exclude short-term holdings, if any. Top Ten Holdings Aya Gold & Silver, Inc. 12.6 % Alamos Gold, Inc. 8.7 % Agnico Eagle Mines Ltd. 7.7 % Wheaton Precious Metals Corp. 7.6 % Barrick Gold Corp. 6.0 % Wesdome Gold Mines Ltd. 5.9 % Jaguar Mining, Inc. 5.5 % Newmont Corp. 4.7 % Endeavour Mining PLC 4.5 % AngloGold Ashanti Ltd. ADR 4.2 % INVESTMENTS BY COUNTRY Industry Allocation |
| Largest Holdings [Text Block] | Top Ten Holdings Aya Gold & Silver, Inc. 12.6 % Alamos Gold, Inc. 8.7 % Agnico Eagle Mines Ltd. 7.7 % Wheaton Precious Metals Corp. 7.6 % Barrick Gold Corp. 6.0 % Wesdome Gold Mines Ltd. 5.9 % Jaguar Mining, Inc. 5.5 % Newmont Corp. 4.7 % Endeavour Mining PLC 4.5 % AngloGold Ashanti Ltd. ADR 4.2 % |
| Material Fund Change [Text Block] | Material Fund Changes The Fund did not have any material changes that occurred since the beginning of the reporting period. |
| Accountant Change Disagreements [Text Block] | Changes in and Disagreements with Accountants There were no changes in or disagreements with the Fund's accountants during the reporting period. |
| Shareholder Report, Line Graph (Details) - USD ($) | 6 Months Ended | 12 Months Ended | 60 Months Ended | 120 Months Ended | |||||||||||
| May 31, 2024 | May 31, 2024 | May 31, 2024 | May 31, 2024 | Nov. 30, 2023 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015 | Nov. 30, 2014 | May 31, 2014 | |
| C000014470 [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | OCM Gold Fund (Investor Class/OCMGX) | ||||||||||||||
| Account Value | $ 18,834 | $ 18,834 | $ 18,834 | $ 18,834 | $ 15,711 | $ 14,667 | $ 18,164 | $ 18,338 | $ 12,378 | $ 7,902 | $ 9,665 | $ 9,575 | $ 6,188 | $ 8,011 | $ 9,550 |
| Average Annual Return, Percent | 14.50% | 15.05% | 14.51% | 6.54% | |||||||||||
| C000014470 [Member] | Without Sales Load [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | OCM Gold Fund (Investor Class/OCMGX)—excluding sales load | ||||||||||||||
| Average Annual Return, Percent | 19.88% | 20.48% | 15.58% | 7.03% | |||||||||||
| C000101831 [Member] | Without Sales Load [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | OCM Gold Fund (Atlas Class/OCMAX)—excluding sales load | ||||||||||||||
| Account Value | $ 21,175 | $ 21,175 | $ 21,175 | $ 21,175 | 17,615 | 16,359 | 20,148 | 20,232 | 13,543 | 8,542 | 10,393 | 10,208 | 6,545 | 8,421 | 10,000 |
| Average Annual Return, Percent | 20.21% | 21.16% | 16.34% | 7.79% | |||||||||||
| Standard & Poor's 500 Index [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | S&P 500 Index | ||||||||||||||
| Account Value | $ 33,028 | $ 33,028 | $ 33,028 | $ 33,028 | 28,386 | 24,935 | 27,464 | 21,470 | 18,279 | 15,743 | 14,813 | 12,056 | 11,157 | 10,858 | 10,000 |
| Average Annual Return, Percent | 16.35% | 28.19% | 15.80% | 12.69% | |||||||||||
| Philadelphia Gold And Silver Index [Member] | |||||||||||||||
| Account Value [Line Items] | |||||||||||||||
| Line Graph and Table Measure Name | Philadelphia Gold & Silver Index | ||||||||||||||
| Account Value | $ 19,822 | $ 19,822 | $ 19,822 | $ 19,822 | $ 16,143 | $ 15,543 | $ 16,420 | $ 16,720 | $ 11,757 | $ 7,849 | $ 9,595 | $ 9,594 | $ 5,516 | $ 8,085 | $ 10,000 |
| Average Annual Return, Percent | 22.79% | 24.48% | 18.22% | 7.08% |
| Shareholder Report, Holdings (Details) | May 31, 2024 |
| C000014470 [Member] | AngloGold Ashanti Ltd ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000014470 [Member] | Endeavour Mining PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000014470 [Member] | Aya Gold And Silver Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000014470 [Member] | Agnico Eagle Mines Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000014470 [Member] | Newmont Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000014470 [Member] | Barrick Gold Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000014470 [Member] | Jaguar Mining Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000014470 [Member] | Wheaton Precious Metals Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000014470 [Member] | Alamos Gold Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000014470 [Member] | Wesdome Gold Mines Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000014470 [Member] | Junior Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000014470 [Member] | Royalty Streaming Companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000014470 [Member] | Exploration and Development Companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000014470 [Member] | Primary Silver Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000014470 [Member] | Intermediate Mid Tier Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| C000014470 [Member] | Major Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000014470 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.80% |
| C000014470 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000014470 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000014470 [Member] | VIRGIN ISLANDS, BRITISH | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000014470 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000014470 [Member] | COLOMBIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000014470 [Member] | JERSEY | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000014470 [Member] | Liabilities in Excess of Other Assets [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
| C000101831 [Member] | AngloGold Ashanti Ltd ADR [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| C000101831 [Member] | Endeavour Mining PLC [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| C000101831 [Member] | Aya Gold And Silver Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000101831 [Member] | Agnico Eagle Mines Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.70% |
| C000101831 [Member] | Newmont Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.70% |
| C000101831 [Member] | Barrick Gold Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6% |
| C000101831 [Member] | Jaguar Mining Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000101831 [Member] | Wheaton Precious Metals Corp [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000101831 [Member] | Alamos Gold Inc [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000101831 [Member] | Wesdome Gold Mines Ltd [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.90% |
| C000101831 [Member] | Junior Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 20.60% |
| C000101831 [Member] | Royalty Streaming Companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.60% |
| C000101831 [Member] | Exploration and Development Companies [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.50% |
| C000101831 [Member] | Primary Silver Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| C000101831 [Member] | Intermediate Mid Tier Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 25% |
| C000101831 [Member] | Major Gold Producers [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 28.60% |
| C000101831 [Member] | CANADA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 77.80% |
| C000101831 [Member] | UNITED STATES | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.90% |
| C000101831 [Member] | UNITED KINGDOM | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 8.70% |
| C000101831 [Member] | VIRGIN ISLANDS, BRITISH | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.20% |
| C000101831 [Member] | AUSTRALIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| C000101831 [Member] | COLOMBIA | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.60% |
| C000101831 [Member] | JERSEY | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 0.40% |
| C000101831 [Member] | Liabilities in Excess of Other Assets [Member] | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | (0.10%) |
