Note 7 - Derivative Financial Instruments (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Derivative Instruments [Table Text Block]

	Asset Derivatives			Liability Derivatives
	Balance Sheet			Balance Sheet
Derivatives not designated as hedging instruments:	Location	Fair Value		Location	Fair Value
Hot-rolled coil steel contracts	Current portion of derivative assets	$	536	Current portion of derivative liability	$	2,212

	Asset Derivatives			Liability Derivatives
	Balance Sheet			Balance Sheet
Derivatives designated as cash flow hedges:	Location	Fair Value		Location	Fair Value
Hot-rolled coil steel contracts hedging sales				Current portion of derivative liability	$	8,905
Derivatives not designated as hedging instruments:
Hot-rolled coil steel contracts	Current portion of derivative assets	$	4,241	Current portion of derivative liability	$	5,524

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

					Pre- Tax Gain
				Location of Gain (Loss)	(Loss) Reclassified
	Pre-Tax Gain			Reclassified	from
	(Loss)			from AOCI into Net	AOCI into Net
	Recognized in OCI			Earnings	Earnings
For the twelve months ended March 31, 2023
Hot-rolled coil steel contracts	$	9,005		Sales	$	(4,116	)
Total	$	9,005			$	(4,116	)
For the twelve months ended March 31, 2022
Hot-rolled coil steel contracts	$	(19,908	)	Sales	$	(31,753	)
				Costs of goods sold		10,633
Total	$	(19,908	)		$	(21,120	)

Derivative Instruments, Gain (Loss) [Table Text Block]

		Gain Recognized in Earnings
	Location of Gain	for Fiscal Year Ended
	Recognized in Earnings	March 31, 2023
Hot-rolled coil steel contracts	Gain (loss) on economic hedges of risk	$	9,306

		Loss Recognized in Earnings
	Location of Loss	for Fiscal Year Ended
	Recognized in Earnings	March 31, 2022
Hot-rolled coil steel contracts	Gain (loss) on economic hedges of risk	$	(11,636	)

Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]

Notes Tables

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Gain (Loss) on
	Derivatives
Balance at March 31, 2022	$	(10,269	)
Other comprehensive income, net of loss, before reclassification		6,830
Total loss reclassified from AOCI (1)		3,122
Net current period other comprehensive income		9,952
Balance at March 31, 2023		(317	)

	Gain (Loss) on
	Derivatives
Balance at March 31, 2021		(11,189	)
Other comprehensive loss, net of income, before reclassification		(15,098	)
Total loss reclassified from AOCI (1)		16,018
Net current period other comprehensive income		920
Balance at March 31, 2022		(10,269	)