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Note 12 - Retirement Plan (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Common Stock [Member] |  |
Stock Repurchase Program, Percentage of Shares Authorized to be Repurchased | 15.00% |
Friedman Industries, Inc. Employee's Retirement and 401(k) Plan [Member] |  |
Employee Service Vesting Period (Year) | 6 years |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 500 | $ 100
Defined Contribution Plan, Cost | $ 0 | $ 400

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