Note 5 - Income Taxes (Tables)

12 Months Ended

Mar. 31, 2023

Notes Tables

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

	2023		2022
	(In thousands)
Current:
Federal	$	—	$	—
Foreign, state and other		—		—
Deferred:
Federal		—		—
Foreign, state and other		—		—
Provision for income tax expense	$	—	$	—

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

	2023			2022
	(In thousands)
Statutory provision	$	(286	)	$	(765	)
Foreign subsidiary		(162	)		(4	)
State taxes		(86	)		(180	)
Permanent differences		148			12
Adjustment to prior year taxes		(8	)		93
Valuation allowance		394			844
Provision for income tax expense	$	—		$	—

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

	2023			2022
	(In thousands)
Deferred tax assets:
Accounts receivable reserves	$	34		$	34
Inventory		260			209
Accruals		9			14
Property and equipment and intangible assets		14			39
Net operating loss and credit carry forwards		4,437			4,064
Valuation allowance		(4,754	)		(4,360	)
Total deferred tax assets	$	—		$	—

Summary of Operating Loss Carryforwards [Table Text Block]

		Federal NOLs		State NOLs
Loss Year (Fiscal)	Included in DTA (in millions)		Included in DTA (in millions)		Expiration Year (Fiscal)
2016	$	—	$	1.4		2034
2017	$	—	$	0.8		2036
2018	$	—	$	2.6		2037
2019	$	3.3	$	2.7		2038
2020	$	3.7	$	3.0		2039
2021	$	4.0	$	3.7		2040
2022	$	3.4	$	3.4		2041
2023	$	1.4	$	1.4		2042
Total	$	15.8	$	19.0