Note 16 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Book income at federal statutory rate, 21%			$ 44,749	$ 46,301
State Adjustments			(315)	(315)
State Capital Taxes			1,500	1,000
State taxes, net of federal benefit			(29,313)	(29,765)
Permanent Items			505	0
Prior Year Deferred Tax Asset/(L) True Up			0	0
Valuation Allowance			(15,626)	(16,221)
Federal research & development credit generated			0	0
Total provision for income taxes	$ 0	$ 500	$ 1,500	$ 1,000