Fees and Expenses - Optimum Fund Trust Classes A, C, Institutional |
Mar. 31, 2026
USD ($)
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| Optimum Large Cap Growth Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 75,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[1] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[2] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 79% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 79.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optimum Small-Mid Cap Growth Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 75,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[3] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[4] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 152% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 152.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optimum Small-Mid Cap Value Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 75,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] | The Total annual fund operating expenses ratio shown above does not correlate to the expense ratio shown in the Financial Highlights table because that ratio does not include the acquired fund fees and expenses. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[5] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[6],[7],[8] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 133% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 133.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optimum International Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 75,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[9] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[10] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 75% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 75.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optimum Fixed Income Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
|
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 100,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[11] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[12] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 375% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 375.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Optimum Large Cap Value Fund | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Heading [Optional Text] | What are the Fund’s fees and expenses? | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Narrative [Text Block] | The table below describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. More information about these and other discounts is available from your financial intermediary, in the Fund’s Prospectus under the section entitled “About your account,” and in the Fund’s statement of additional information (SAI) under the section entitled “Purchasing Shares.”
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| Expense Breakpoint Discounts [Text] | You may qualify for sales-charge discounts if you and your family invest, or agree to invest in the future, at least $75,000 in Optimum Funds. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Breakpoint, Minimum Investment Required [Amount] | $ 75,000 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees Caption [Optional Text] | Shareholder fees (fees paid directly from your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Shareholder Fees [Table] |
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[13] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating Expenses Caption [Optional Text] | Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annual Fund Operating Expenses [Table] |
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[14] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expenses Deferred Charges [Text Block] | Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example [Heading] | Example | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Expense Example Narrative [Text Block] | This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. In addition, the example shows expenses for Class C shares, assuming those shares were not redeemed at the end of those periods. The example also assumes that your investment has a 5% return each year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
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| Expense Example, With Redemption [Table] |
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| Expense Example, No Redemption, By Year, Caption [Text] | (if not redeemed)C | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Heading] | Portfolio turnover | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Portfolio Turnover [Text Block] | The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate 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 the annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 16% of the average value of its portfolio.
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| Portfolio Turnover, Rate | 16.00% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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