Note 9 - Leases - Operating Lease (Details)	3 Months Ended	9 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Operating lease cost	$ 42,516	$ 127,546
Variable lease cost	31,029	93,087
Total	73,545	220,633
Operating cash flows for leases	$ 37,962	$ 113,886
Remaining lease term (Month)	51 months	51 months
Discount rate	3.50%	3.50%