v3.25.1
Note 6 - Derivative Financial Instruments - Gain (Loss) Recognized in Other Comprehensive Income (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Pre-tax gain (loss) recognized in OCI   $ 0
Revenue $ 444,600 516,251
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Revenue   (418)
Hot-rolled Coil Future Contracts [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Revenue   (418)
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member]    
Pre-tax gain (loss) recognized in OCI   $ 0