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Note 11 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2025
Net Sales | $ 152,383 | $ 106,759 | $ 287,160 | $ 221,310 |
Cost of Goods and Services Sold | 3,627 | 2,282 | 6,671 | 5,130 |
Depreciation and amortization | 937 | 823 | 1,784 | 1,618 |
Cost of Product and Service Sold | 149,504 | 106,983 | 277,238 | 222,932 |
EARNINGS (LOSS) FROM OPERATIONS: | 2,879 | (224) | 9,922 | (1,622) |
Gain on economic hedges of risk | 851 | 194 | 1,127 | 5,569 |
Interest expense | (754) | (869) | (1,432) | (1,550) |
Other income | 1 | (3) | 5 |  |
EARNINGS BEFORE INCOME TAXES | 2,977 | (902) | 9,622 | 2,397 |
Identifiable assets | 311,289 |  | 311,289 |  | $ 226,822
Material Sold Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 126,082 | 88,761 | 231,786 | 184,656 |
Processing and Warehouse Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 9,064 | 7,861 | 18,392 | 16,558 |
Delivery Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 7,134 | 5,381 | 13,534 | 11,432 |
Commercial Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 2,660 | 1,653 | 5,071 | 3,316 |
Loss on Disposal of Property, Plant and Equipment [Member] |  |  |  |  |
Cost of Goods and Services Sold |  | 222 |  | 222 |
Flat-roll [Member] |  |  |  |  |
Net Sales | 143,340 | 97,379 | 267,407 | 200,766 |
Tubular [Member] |  |  |  |  |
Net Sales | 9,043 | 9,380 | 19,753 | 20,544 |
Operating Segments [Member] |  |  |  |  |
Identifiable assets | 304,447 |  | 304,447 |  | 221,682
Operating Segments [Member] | Flat-roll [Member] |  |  |  |  |
Net Sales | 143,340 | 97,379 | 267,407 | 200,766 |
Depreciation and amortization | 825 | 709 | 1,594 | 1,389 |
Cost of Product and Service Sold | 137,642 | 94,710 | 252,922 | 195,431 |
EARNINGS (LOSS) FROM OPERATIONS: | 5,698 | 2,669 | 14,485 | 5,335 |
Identifiable assets | 279,119 |  | 279,119 |  | 204,890
Operating Segments [Member] | Flat-roll [Member] | Material Sold Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 119,820 | 81,398 | 218,974 | 167,792 |
Operating Segments [Member] | Flat-roll [Member] | Processing and Warehouse Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 7,515 | 5,667 | 14,413 | 11,954 |
Operating Segments [Member] | Flat-roll [Member] | Delivery Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 7,009 | 5,217 | 13,269 | 11,095 |
Operating Segments [Member] | Flat-roll [Member] | Commercial Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 2,473 | 1,497 | 4,672 | 2,979 |
Operating Segments [Member] | Flat-roll [Member] | Loss on Disposal of Property, Plant and Equipment [Member] |  |  |  |  |
Cost of Goods and Services Sold |  | 222 |  | 222 |
Operating Segments [Member] | Tubular [Member] |  |  |  |  |
Net Sales | 9,043 | 9,380 | 19,753 | 20,544 |
Depreciation and amortization | 52 | 85 | 101 | 169 |
Cost of Product and Service Sold | 8,175 | 9,962 | 17,556 | 22,311 |
EARNINGS (LOSS) FROM OPERATIONS: | 868 | (582) | 2,197 | (1,767) |
Identifiable assets | 25,328 |  | 25,328 |  | 16,792
Operating Segments [Member] | Tubular [Member] | Material Sold Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 6,262 | 7,363 | 12,812 | 16,864 |
Operating Segments [Member] | Tubular [Member] | Processing and Warehouse Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 1,549 | 2,194 | 3,979 | 4,604 |
Operating Segments [Member] | Tubular [Member] | Delivery Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 125 | 164 | 265 | 337 |
Operating Segments [Member] | Tubular [Member] | Commercial Expense [Member] |  |  |  |  |
Cost of Goods and Services Sold | 187 | 156 | 399 | 337 |
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |  |  |  |
Net Sales |  | 0 |  | 0 |
Cost of Goods and Services Sold | 3,627 | 2,282 | 6,671 | 5,130 |
Depreciation and amortization | 60 | 29 | 89 | 60 |
Cost of Product and Service Sold | 3,687 | 2,311 | 6,760 | 5,190 |
EARNINGS (LOSS) FROM OPERATIONS: | (3,687) | $ (2,311) | (6,760) | $ (5,190) |
Identifiable assets | $ 6,842 |  | $ 6,842 |  | $ 5,140

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