Note 13 - Warrant Liability (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Jul. 02, 2022	Jul. 31, 2021	Jul. 02, 2021
Warrant Liability, Current	$ 0	$ 182,161
Warrant Liability, Current	0	(182,161)
Net Income (Loss) Attributable to Parent, Total	$ 96,322	1,384,263
Revision of Prior Period, Error Correction, Adjustment [Member]
Warrant Liability, Current		(182,000)
Additional Paid in Capital, Total		288,000
Warrant Liability, Current		182,000
Prepaid Expense, Current, Total		181,000
Net Income (Loss) Attributable to Parent, Total		75,000
Consulting Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					3,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)			$ 0.20		$ 0.17
Class of Warrant or Right, Exercisable Period (Month)			12 months		12 months
Warrant Liability, Current		182,000		$ 288,000
Warrant Liability, Current		$ (182,000)		$ (288,000)