Note 11 - Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Operating lease right-of-use assets	$ 61,040	$ 93,457
Current portion of operating lease obligations	36,123	33,118
Operating lease obligations, net of current portion	25,187	61,794
Total operating lease liabilities	61,310	94,912
Finance lease cost:
Property and equipment, at cost	53,885	54,066
Accumulated depreciation	(53,885)	(48,659)
Current portion of finance lease obligations	0	2,844
Finance lease obligations, net of current portion	0	0
Total finance lease liabilities	0	2,844
Property Plant and Equipment, Net [Member]
Finance lease cost:
Property and equipment, net	$ 0	$ 5,407