Note 7 - Leases - Operating Lease (Details) - USD ($)	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating lease cost	$ 170,062	$ 158,439
Variable lease cost	120,606	109,449
Total	290,668	267,888
Operating cash flows for leases	$ 174,313	$ 133,299
Remaining lease term (years) (Month)	4 months	5 months
Discount rate	3.50%	3.50%