Note 13 - Commitments - Lease Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash paid for operating lease liabilities	$ 31,999	$ 31,303	$ 63,881	$ 62,606
Cash paid for finance lease liabilities	$ 2,685	$ 2,685	$ 5,370	5,370
Right-of-use assets obtained in exchange for new operating lease liabilities (1)				663,009
Property and equipment obtained in exchange for new finance lease liabilities				$ 43,242
Finance leases (years) (Year)	2 years 6 months	5 years 9 months 18 days	2 years 6 months	5 years 9 months 18 days
Operating leases (years) (Year)	4 years 9 months	3 years 7 months 6 days	4 years 9 months	3 years 7 months 6 days