v3.25.2
Shareholder Report
12 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name DUPREE MUTUAL FUNDS
Entity Central Index Key 0000311101
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
C000032726 [Member]  
Shareholder Report [Line Items]  
Fund Name Alabama Tax‑Free Income Series
Class Name Alabama Tax‑Free Income Series
Trading Symbol DUALX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Alabama Tax‑Free Income Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree‑funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree‑funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Alabama Tax‑Free Income Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated municipal bonds generally underperformed shorter-dated municipal bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yields on the long end of the yield curve climbed (lower prices) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of ‑1.13% during the Review Period which was lower than the Bloomberg Municipal Bond Index (the “Muni Index”) which provided a total return of 1.11%. The Fund’s underperformance was primarily due to the fact that it had an average nominal maturity of 15.91 years versus 13.30 years for the Muni Index. Additionally, unlike the Fund, the Muni Index does not reflect any expenses and/or transaction costs.
During the Review Period, the Fund’s use of its current investment strategies did not cause the Fund’s performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Alabama Tax‑Free Income Series
       (1.13)        (0.50)        1.52
       
Bloomberg Municipal Bond Index
       1.11        0.51        2.20
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.
Net Assets $ 19,692,379
Holdings Count | Holding 70
Advisory Fees Paid, Amount $ 69,740
Investment Company Portfolio Turnover 20.09%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 19,692,379  
   
Total number of portfolio holdings
     70  
   
Total advisory fees paid
   $ 69,740  
   
Portfolio turnover rate as of the end of year
     20.09%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
LOGO
Credit Quality*
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
C000032727 [Member]  
Shareholder Report [Line Items]  
Fund Name Kentucky Tax‑Free Income Series
Class Name Kentucky Tax‑Free Income Series
Trading Symbol KYTFX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Kentucky Tax‑Free Income Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree-funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree-funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Kentucky Tax‑Free Income Series
     $ 61          0.61%  
Expenses Paid, Amount $ 61
Expense Ratio, Percent 0.61%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated municipal bonds generally underperformed shorter-dated bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yields on the long end of the yield curve climbed (lower prices) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of ‑0.18% during the Review Period which was lower than the Bloomberg Municipal Bond Index (“Muni Index”) which provided a total return of 1.11%. The Fund’s underperformance was primarily due to the fact that it had an average nominal maturity of 13.97 years versus 13.30 years for the Muni Index. Additionally, unlike the Fund, the Muni Index does not reflect any expenses and/or transaction costs.
During the Review Period, the Fund’s use of its current investment strategies did not cause the Fund’s performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Kentucky Tax‑Free Income Series
       (0.18)        0.23        1.64
       
Bloomberg Municipal Bond Index
       1.11        0.51        2.20
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.
Net Assets $ 706,643,076
Holdings Count | Holding 411
Advisory Fees Paid, Amount $ 2,907,238
Investment Company Portfolio Turnover 18.92%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 706,643,076  
   
Total number of portfolio holdings
     411  
   
Total advisory fees paid
   $ 2,907,238  
   
Portfolio turnover rate as of the end of year
     18.92%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
LOGO
Credit Quality*
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
Material Fund Change [Text Block]
Material Fund Changes
Effective as of the close of business of May 16, 2025, the Kentucky Tax‑Free Short‑to‑Medium Series transferred all of its assets and liabilities to the Fund in exchange for shares of the Fund. Each shareholder in the Kentucky Tax‑Free Short‑to‑Medium Series received shares of the Fund equal to the value of the shares they owned in the Kentucky Tax‑Free Short‑to‑Medum Series.
C000032729 [Member]  
Shareholder Report [Line Items]  
Fund Name Mississippi Tax‑Free Income Series
Class Name Mississippi Tax‑Free Income Series
Trading Symbol DUMSX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Mississippi Tax‑Free Income Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree-funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree-funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Mississippi Tax‑Free Income Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated municipal bonds generally underperformed shorter-dated bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yield on the long end of the yield curve climbed (lower prices) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of 0.08% during the Review Period which was lower than the Bloomberg Municipal Bond Index (the “Muni Index”) which provided a total return of 1.11%.The underperformance of the Fund was due primarily to the fact that the Fund held had an average nominal maturity of 14.88 years versus 13.30 years for the Muni Index. Additionally, unlike the Fund, the Muni Index does not reflect any expenses and/or transaction costs.
During the Review Period, the Fund’s use of its current investment strategy did not cause the Fund’s performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Mississippi Tax‑Free Income Series
       0.08        (0.27)        1.54
       
Bloomberg Municipal Bond Index
       1.11        0.51        2.20
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.
Net Assets $ 4,510,744
Holdings Count | Holding 28
Advisory Fees Paid, Amount $ 3,436
Investment Company Portfolio Turnover 10.08%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 4,510,744  
   
Total number of portfolio holdings
     28  
   
Total advisory fees paid
   $ 3,436  
   
Portfolio turnover rate as of the end of year
     10.08%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
 
 
LOGO
Credit Quality*
 
 
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
C000032730 [Member]  
Shareholder Report [Line Items]  
Fund Name North Carolina Tax‑Free Income Series
Class Name North Carolina Tax‑Free Income Series
Trading Symbol NTFIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the North Carolina Tax‑Free Income Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree-funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree-funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund (Class)     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
North Carolina Tax‑Free Income Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated municipal bonds generally underperformed shorter-dated bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yields on the long end of the yield curve climbed (prices down) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of 0.05% during the Review Period which was lower than the Bloomberg Municipal Bond Index (the “Muni Index”) which provided a total return of 1.11%. The underperformance of the Fund was due primarily to the fact that it had an average nominal maturity of 14.04 years versus 13.30 years for the Muni Index. Additionally, unlike the Fund, the Muni Index does not reflect any expenses and/or transaction costs.
During the Review Period, the Fund’s use of its current investment strategy did not cause the Fund’s performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
North Carolina Tax‑Free Income Series
       0.05        (0.31)        1.49
       
Bloomberg Municipal Bond Index
       1.11        0.51        2.20
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.
Net Assets $ 110,020,439
Holdings Count | Holding 182
Advisory Fees Paid, Amount $ 504,980
Investment Company Portfolio Turnover 23.38%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 110,020,439  
   
Total number of portfolio holdings
     182  
   
Total advisory fees paid
   $ 504,980  
   
Portfolio turnover rate as of the end of year
     23.38%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
LOGO
Credit Quality*
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
Material Fund Change [Text Block]
Material Fund Changes
Effective as of the close of business of May 16, 2025, the North Carolina Tax‑Free Short‑to‑Medium Series transferred all of its assets and liabilities to the Fund in exchange for shares of the Fund. Each shareholder in the North Carolina Tax‑Free Short‑to‑Medium Series received shares of the Fund equal to the value of the shares they owned in the North Carolina Tax‑Free Short‑to‑Medum Series.
C000032732 [Member]  
Shareholder Report [Line Items]  
Fund Name Tennessee Tax‑Free Income Series
Class Name Tennessee Tax‑Free Income Series
Trading Symbol TNTIX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Tennessee Tax‑Free Income Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree‑funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree‑funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Tennessee Tax‑Free Income Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated municipal bonds generally underperformed shorter-dated bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yields on the long end of the yield curve climbed (lower prices) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of ‑0.97% during the Review Period which was lower than the Bloomberg Municipal Bond Index (the “Muni Index”) which provided a total return of 1.11%. The underperformance of the Fund was primarily due to the fact that the Fund had an average nominal maturity of 14.93 years versus 13.30 years for the Muni Index. Additionally, unlike the Fund, the Muni Index does not reflect any expenses and/or transaction costs
During the Review Period, the Fund’s use of its current investment strategy did not cause the Fund’s performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Tennessee Tax‑Free Income Series
       (0.97)        (0.17)        1.38
       
Bloomberg Municipal Bond Index
       1.11        0.51        2.20
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.
Net Assets $ 50,198,014
Holdings Count | Holding 78
Advisory Fees Paid, Amount $ 220,385
Investment Company Portfolio Turnover 24.00%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 50,198,014  
   
Total number of portfolio holdings
     78  
   
Total advisory fees paid
   $ 220,385  
   
Portfolio turnover rate as of the end of year
     24.00%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
LOGO
Credit Quality*
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
Material Fund Change [Text Block]
Material Fund Changes
Effective as of the close of business of May 16, 2025, the Tennessee Tax‑Free Short‑to‑Medium Series transferred all of its assets and liabilities to the Fund in exchange for shares of the Fund. Each shareholder in the Tennessee Tax‑Free Short‑to‑Medium Series received shares of the Fund equal to the value of the shares they owned in the Tennessee Tax‑Free Short‑to‑Medum Series.
C000032734 [Member]  
Shareholder Report [Line Items]  
Fund Name Intermediate Government Bond Series
Class Name Intermediate Government Bond Series
Trading Symbol DPIGX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Intermediate Government Bond Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree-funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree-funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Intermediate Government Bond Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
The Federal Reserve cut the fed funds rate on three separate occasions during the 12‑month period ended June 30, 2025 (the “Review Period”) causing Treasury yields to decline (prices higher) on the short and intermediate portions of the yield curve.
The Fund provided a total return of 4.86% during the Review Period which was lower than the Bloomberg Intermediate U.S. Government Bond Index (“Gov. Bond Index”) which provided a total return of 6.23%. The Fund’s underperformance was due primarily to the fact that it had a shorter duration of 2.28 years than the Gov Bond Index which had a duration of 3.54 years. Shorter-dated bonds which were anchored to par experienced less price appreciation than bonds with slightly longer durations.
During the Review Period, the Fund’s use of its current management strategy did not cause the performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
LOGO
Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Intermediate Government Bond Series
       4.86        1.16        1.88
       
Bloomberg Intermediate U.S. Government Bond Index
       6.23        0.15        1.55
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.
Net Assets $ 8,482,244
Holdings Count | Holding 21
Advisory Fees Paid, Amount $ 5,773
Investment Company Portfolio Turnover 80.78%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 8,482,244  
   
Total number of portfolio holdings
     21  
   
Total advisory fees paid
   $ 5,773  
   
Portfolio turnover rate as of the end of year
     80.78%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments of the Fund.
Composition
LOGO
Credit Quality*
LOGO
Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.
C000093320 [Member]  
Shareholder Report [Line Items]  
Fund Name Taxable Municipal Bond Series
Class Name Taxable Municipal Bond Series
Trading Symbol DUTMX
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Taxable Municipal Bond Series (the “Fund”) for the period from July 1, 2024, to June 30, 2025.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at www.dupree‑funds.com/documents. You can also request this information by contacting us at (800) 866‑0614 or info@dupree-funds.com.
Additional Information Phone Number (800) 866‑0614
Additional Information Email info@dupree-funds.com
Additional Information Website www.dupree‑funds.com/documents
Expenses [Text Block]
What were the Fund costs for the last year?
(Based on a hypothetical $10,000 investment)
The table below explains the costs that you would have paid within the reporting period.
     
Fund     
Costs of a $10,000
investment
       Costs paid as a percentage of a
$10,000 investment
 
     
Taxable Municipal Bond Series
     $ 70          0.70%  
Expenses Paid, Amount $ 70
Expense Ratio, Percent 0.70%
Factors Affecting Performance [Text Block]
How did the Fund perform last year?
Longer-dated taxable municipal bonds generally underperformed shorter-dated taxable municipal bonds during the 12‑month period ended June 30, 2025 (the “Review Period”). Shorter-dated bonds benefited from cuts to the fed funds rate, while yields on the long end of the yield curve climbed (lower prices) in response to an unexpected rebound in consumer-price inflation.
The Fund provided a total return of 4.00% during the Review Period which was lower than the Bloomberg Taxable Municipal Bond Index (“Taxable Muni Index”) which provided a total return of 5.54%. The Fund’s underperformance was due primarily to the fact that it had an average nominal maturity of 18.27 years versus 14.12 years for the Taxable Muni Index.
During the Review Period, the Fund’s use of its current investment strategy did not cause the performance to deviate materially from the manager’s expectations. We do not plan to change the investment strategy of the Fund substantially in the upcoming year.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of the Fund’s future performance.
Line Graph [Table Text Block]
How has the Fund historically performed?
The following graph compares 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.
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Average Annual Return [Table Text Block]
Average annual total return values (as of June 30, 2025):
       
        1 Year        5 Years        10 Years  
       
Taxable Municipal Bond Series
       4.00        (2.81)        0.91
       
Bloomberg Taxable Municipal Bond Index
       5.51        (0.43)        3.13
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.
Net Assets $ 3,385,865
Holdings Count | Holding 20
Advisory Fees Paid, Amount $ 0
Investment Company Portfolio Turnover 12.60%
Additional Fund Statistics [Text Block]
What are the Key Fund statistics you should know?
The following table outlines key Fund statistics that you should pay attention to:
   
Fund’s net assets
   $ 3,385,865  
   
Total number of portfolio holdings
     20  
   
Total advisory fees paid
   $ ‑0‑  
   
Portfolio turnover rate as of the end of year
     12.60%  
Holdings [Text Block]
What is the Fund invested in?
The tables and charts below show the investment makeup of the Fund, representing the percentage of total investments and/or total net assets of the Fund.
Composition
 
 
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Credit Quality*
 
 
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Ratings have been assigned by a Nationally Recognized Statistical Rating Organization (“NRSRO”). See Schedules of Portfolio Investments for individual bond ratings. Visit our website at www.dupree-funds.com/documents.