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Note 6 - Derivative Financial Instruments (Tables) | 12 Months Ended
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Mar. 31, 2025
Notes Tables |
Schedule of Derivative Instruments [Table Text Block] |
| Asset Derivatives |  | Liability Derivatives |
| Balance Sheet |  |  |  |  | Balance Sheet |  |  |  |
Derivatives not designated as hedging instruments: | Location |  | Fair Value |  | Location |  | Fair Value |
Hot-rolled coil steel contracts | Current portion of derivative assets |  | $ | 636 |  | Current portion of derivative liability |  | $ | 287 |
| Asset Derivatives |  | Liability Derivatives |
| Balance Sheet |  |  |  |  | Balance Sheet |  |  |  |
Derivatives not designated as hedging instruments: | Location |  | Fair Value |  | Location |  | Fair Value |
Hot-rolled coil steel contracts | Current portion of derivative assets |  | $ | 74 |  | Current portion of derivative liability |  | $ | 1,686 |
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  |  |  |  | Location of Loss |  | Pre- Tax |
|  | Pre-Tax Gain (Loss) |  | Reclassified from |  | Loss Reclassified from |
|  | Recognized in OCI |  | AOCI into Net Earnings |  | AOCI into Net Earnings |
For the fiscal year ended March 31, 2024 |  |  |  |  |  |  |  |  |
Hot-rolled coil steel contracts |  | $ | — |  | Sales |  | $ | (418 | )
Total |  | $ | — |  |  |  | $ | (418 | )
Derivative Instruments, Gain (Loss) [Table Text Block] |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for Fiscal Year Ended |
| Recognized in Earnings |  | March 31, 2025 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 7,598 |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for Fiscal Year Ended |
| Recognized in Earnings |  | March 31, 2024 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 1,848 |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Gain (Loss) on |
|  | Derivatives |
Balance at March 31, 2023 |  |  | (317 | )
Other comprehensive loss, net of income, before reclassification |  |  | — |
Total loss reclassified from AOCI (1) |  |  | 317 |
Net current period other comprehensive income |  |  | 317 |
Balance at March 31, 2024 |  | $ | — |

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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References No definition available. + Details
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