Note 6 - Derivative Financial Instruments - Net Fair Value of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Current portion of derivative assets	Current portion of derivative assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Current portion of derivative liability	Current portion of derivative liability
Hot-rolled Coil Future Contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Short [Member]
Derivative assets	$ 636	$ 74
Derivative liabilities	$ 287	$ 1,686

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

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