v3.26.1
Note 7 - Derivative Financial Instruments - Gain (Loss) Recognized in Earnings for Derivative Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Hot-rolled Coil Future Contracts [Member] | Designated as Hedging Instrument [Member]    
Hot-rolled coil steel contracts $ 3,412 $ 7,598