| Segment Reporting [Table Text Block] |
| | | For the Twelve Months Ended March 31, 2026 | |
| | | Flat-roll | | | Tubular | | | Other | | | Total | |
| Net Sales | | $ | 596,130 | | | $ | 50,783 | | | $ | — | | | $ | 646,913 | |
| Cost and expenses: | | | | | | | | | | | | | | | | |
| Cost of materials sold | | | 483,904 | | | | 34,792 | | | | — | | | | 518,696 | |
| Processing and warehousing expense | | | 33,066 | | | | 8,656 | | | | — | | | | 41,722 | |
| Delivery expense | | | 27,712 | | | | 686 | | | | — | | | | 28,398 | |
| Commercial expense | | | 12,422 | | | | 837 | | | | — | | | | 13,259 | |
| Depreciation and amortization | | | 3,374 | | | | 237 | | | | 213 | | | | 3,824 | |
| General corporate expenses | | | — | | | | — | | | | 15,363 | | | | 15,363 | |
| | | | 560,478 | | | | 45,208 | | | | 15,576 | | | | 621,262 | |
| EARNINGS (LOSS) FROM OPERATIONS: | | | 35,652 | | | | 5,575 | | | | (15,576 | ) | | | 25,651 | |
| Fair value adjustment of contingent consideration | | | | | | | | | | | | | | | 1,420 | |
| Gain on economic hedges of risk | | | | | | | | | | | | | | | 3,412 | |
| Interest expense | | | | | | | | | | | | | | | (4,104 | ) |
| Other income (expense) | | | | | | | | | | | | | | | (7 | ) |
| TOTAL EARNINGS BEFORE INCOME TAXES | | | | | | | | | | | | | | $ | 26,372 | |
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| | | For the Twelve Months Ended March 31, 2025 | |
| | | Flat-roll | | | Tubular | | | Other | | | Total | |
| Net Sales | | $ | 404,644 | | | $ | 39,956 | | | $ | — | | | $ | 444,600 | |
| Cost and expenses: | | | | | | | | | | | | | | | | |
| Cost of materials sold | | | 334,426 | | | | 31,222 | | | | — | | | | 365,648 | |
| Processing and warehousing expense | | | 24,544 | | | | 8,933 | | | | — | | | | 33,477 | |
| Delivery expense | | | 22,563 | | | | 665 | | | | — | | | | 23,228 | |
| Commercial expense | | | 6,301 | | | | 755 | | | | — | | | | 7,056 | |
| Depreciation and amortization | | | 2,869 | | | | 304 | | | | 118 | | | | 3,291 | |
| General corporate expenses | | | — | | | | — | | | | 9,115 | | | | 9,115 | |
| | | | 390,703 | | | | 41,879 | | | | 9,233 | | | | 441,815 | |
| Gain (loss) on disposal of property, plant and equipment | | | (222 | ) | | | 480 | | | | — | | | | 258 | |
| EARNINGS (LOSS) FROM OPERATIONS: | | | 13,719 | | | | (1,443 | ) | | | (9,233 | ) | | | 3,043 | |
| Gain on economic hedges of risk | | | | | | | | | | | | | | | 7,598 | |
| Interest expense | | | | | | | | | | | | | | | (2,953 | ) |
| Other income | | | | | | | | | | | | | | | 5 | |
| TOTAL EARNINGS BEFORE INCOME TAXES | | | | | | | | | | | | | | $ | 7,693 | |
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| | | Year Ended March 31, | | | | | | | | | |
| | | 2026 | | | 2025 | | | | | | | | | |
| IDENTIFIABLE ASSETS: | | | | | | | | | | | | | | | | |
| Flat-roll | | $ | 301,528 | | | $ | 204,890 | | | | | | | | | |
| Tubular | | | 28,822 | | | | 16,792 | | | | | | | | | |
| | | | 330,350 | | | | 221,682 | | | | | | | | | |
| General corporate assets | | | 6,460 | | | | 5,140 | | | | | | | | | |
| TOTAL ASSETS | | $ | 336,810 | | | $ | 226,822 | | | | | | | | | |
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| CAPITAL EXPENDITURES: | | | | | | | | | | | | | | | | |
| Flat-roll | | $ | 6,150 | | | $ | 3,823 | | | | | | | | | |
| Tubular | | | 1,011 | | | | 179 | | | | | | | | | |
| Corporate and other | | | — | | | | — | | | | | | | | | |
| TOTAL CAPITAL EXPENDITURES | | $ | 7,161 | | | $ | 4,002 | | | | | | | | | |
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