Note 10 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

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

	Fiscal Year:
	2023			2022		2021
	(Restated)			(Restated)
Current:
Federal	$	5,819		$	3,454	$	13,121
State		2,277			3,107		4,145
Total		8,096			6,561		17,266
Deferred:
Federal	$	(3,886	)	$	7,084	$	13,486
State		352			50		3,164
Total		(3,534	)		7,134		16,650
Total income taxes	$	4,562		$	13,695	$	33,916

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

	Fiscal Year:
	2023			2022			2021
	(Restated)			(Restated)
Computed (expected tax rate)		21.0	%		21.0	%		21.0	%
State income taxes (net of federal tax benefit)		4.1	%		3.7	%		3.1	%
Federal credits		-3.9	%		-0.9	%		-0.3	%
State rate changes		2.8	%		0.3	%		0.0	%
State credit expiration		2.1	%		0.9	%		0.0	%
Change in valuation allowance		7.8	%		-1.2	%		0.2	%
Federal return to accrual		-0.3	%		-1.0	%		0.0	%
State return to accrual		-0.6	%		0.1	%		0.0	%
Permanent differences		0.8	%		0.2	%		0.0	%
Federal net operating loss (NOL) carryback rate difference		0.0	%		0.0	%		-2.8	%
Interest received on federal NOL carryback		0.0	%		-0.3	%		-0.2	%
Uncertain tax benefits return to accrual		0.0	%		0.3	%		0.0	%
Other		-0.7	%		-0.2	%		0.2	%
Effective income tax rate		33.1	%		22.9	%		21.2	%

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

	As of:
	March 31,			March 31,
	2023			2022
	(Restated)			(Restated)
Deferred income tax assets:
Future tax credits	$	5,007		$	5,245
Inventory valuation		8,364			3,024
Employee benefits		2,335			2,191
Insurance		471			345
State depreciation basis differences		3,218			-
Operating leases		942			-
Intangibles		1,514			-
Other comprehensive loss		7,117			8,975
Interest		8			3
Prepaid revenue		296			374
Net operating loss and other tax attribute carryovers		1,233			614
Other		327			-
Total assets		30,832			20,771
Deferred income tax liabilities:
Property basis and depreciation difference		26,450			21,805
Inventory reserve		2,101			-
Intangibles		-			17
Right-of-use assets		7,045			5,764
Pension		21,528			21,253
Other		182			1,017
Total liabilities		57,306			49,856
Valuation allowance - noncurrent		5,007			3,931
Deferred income tax liability, net	$	(31,481	)	$	(33,016	)

Summary of Income Tax Contingencies [Table Text Block]

	As of:
	March 31,			March 31,
	2023			2022
	(Restated)			(Restated)
Beginning balance	$	655		$	376
Tax positions related to current year:
Additions		96			139
Tax positions related to prior years:
Additions		-			215
Reductions		-			-
Lapses in statues of limitations		(9	)		(75	)
Ending balance	$	742		$	655