Note 10 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year Ended March 31,
	2023			2022
Federal
Current	$	2,135		$	3,881
Deferred		3,425			(478	)
		5,560			3,403
State
Current		1,384			945
Deferred		(99	)		(83	)
		1,285			862
Total	$	6,845		$	4,265

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended March 31,
	2023			2022
Income tax expense at U.S. federal statutory rate		21.0	%		21.0	%
Current year state and local income taxes net of federal income tax benefit		3.5			3.7
Other		(0.3	)		(1.4	)
Provision for income taxes		24.2	%		23.3	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	March 31,
	2023			2022
Deferred tax liabilities:
Depreciation	$	(5,786	)	$	(1,788	)
Total deferred tax liabilities		(5,786	)		(1,788	)
Deferred tax assets:
Unrealized derivative loss - OCI		106			3,271
Inventory capitalization		548			98
Postretirement benefits other than pensions		25			29
Restricted stock compensation		91			69
Unrealized loss - mark to market derivatives		526			388
Other		133			66
Total deferred tax assets		1,429			3,921
Net deferred tax asset (liability)	$	(4,357	)	$	2,133