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Note H - Derivative Financial Instruments - Net Fair Value of Derivative Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Mar. 31, 2023
Derivative assets $ 3,000 $ 1,600
Current Portion of Derivative Assets [Member] | Hot-rolled Coil Future Contracts [Member] | Not Designated as Hedging Instrument [Member] | Short [Member]    
Derivative assets 692 536
Current Portion of Derivative Liability [Member] | Hot-rolled Coil Future Contracts [Member] | Not Designated as Hedging Instrument [Member] | Short [Member]    
Derivative liabilities $ 400 $ 2,212