Note 5 - Income Taxes - Schedule of Deferred Tax Assets (Details) - USD ($)	Mar. 31, 2025	Mar. 31, 2024
Accounts receivable reserves	$ 327,000	$ 71,000
Inventory	175,000	190,000
Accruals	10,000	116,000
Net operating loss and credit carry forwards	5,649,000	4,152,000
Total deferred tax assets:	6,161,000	4,529,000
Valuation allowance	(6,145,000)	(4,510,000)
Net deferred tax assets:	16,000	19,000
Property and equipment	(16,000)	(19,000)
Total deferred tax liabilities:	$ (16,000)	$ (19,000)