Note 9 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2025

Notes Tables

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

		*Year Ended March 31,*
		*2025*				2024
Federal
Current		$	1,234			$	4,248
Deferred			112				473
			1,346				4,721
State
Current			153				927
Deferred			109				321
			262				1,248
Total		$	1,608			$	5,969

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

		*Year Ended March 31,*
		*2025*				2024
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			2.7				4.3
Other			(2.8	)			0.3
Provision for income taxes			20.9	%			25.6	%

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

		*March 31,*
		*2025*				2024
Deferred tax liabilities:
Depreciation		$	(6,199	)		$	(6,451	)
Unrealized gain - mark to market derivatives			(87	)			—
Total deferred tax liabilities			(6,286	)			(6,451	)
Deferred tax assets:
Inventory capitalization			537				552
Interest expense limitation			140				—
Postretirement benefits other than pensions			29				26
Restricted stock compensation			23				77
Unrealized Loss - mark to market derivatives			—				403
Other			79				136
Total deferred tax assets			808				1,194
Net deferred tax liability		$	(5,478	)		$	(5,257	)