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Note C - Inventories - Schedule of Inventory (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Mar. 31, 2024
Inventory, Net $ 115,394 $ 115,804
Flat-Roll Inventory [Member]    
Flat-Roll raw material 88,379 85,483
Flat-Roll finished goods 16,504 17,030
Tubular Inventory [Member]    
Flat-Roll raw material 5,707 4,185
Flat-Roll finished goods $ 4,804 $ 9,106