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Note J - Segment Information (Details Textual) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Derivative Instruments Not Designated as Hedging Instruments, Gain |  | $ 1,238,320 | $ (0)
Gain (Loss) on Extinguishment of Debt, Total |  | 1,706,614 | $ (0)
Paycheck Protection Program CARES Act [Member] |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  | 1,706,614 |
Nonoperating Income (Expense) [Member] | Paycheck Protection Program CARES Act [Member] |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  | 1,706,614 |
Hot-rolled Coil Steel Contracts [Member] | Nonoperating Income (Expense) [Member] |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain | $ 1,721,700 |  |
Derivative Instruments Not Designated as Hedging Instruments, Loss |  | $ 6,498,040 |

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