Note 9 - Leases - Operating Lease (Details)	3 Months Ended	6 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)
Operating lease cost	$ 42,515	$ 85,031
Variable lease cost	30,126	61,315
Total	72,641	146,346
Operating cash flows for leases	$ 42,723	$ 87,156
Remaining lease term (Month)	42 months	42 months
Discount rate	3.50%	3.50%