Note 4 - Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Mar. 31, 2026 |
|---|---|---|
| Total | $ 191,080 | $ 172,223 |
| Flat-Roll Inventory [Member] | ||
| Flat-Roll raw material | 131,118 | 120,763 |
| Flat-Roll finished goods | 32,329 | 31,068 |
| Tubular Inventory [Member] | ||
| Flat-Roll raw material | 17,063 | 9,441 |
| Flat-Roll finished goods | $ 10,570 | $ 10,951 |
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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