Note 8 - Commitments and Contingencies - Lease Cost (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	[1]
Operating lease cost	$ 33,257	$ 31,836
Amortization of lease assets	163,758	16,446
Interest on lease liabilities	54,905	3,789
Total finance lease costs	$ 218,663	$ 20,235

[1] Represent amounts under ASC 840.