Note 13 - Commitments - Lease Expense (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash paid for operating lease liabilities	$ 31,882	$ 31,303
Cash paid for finance lease liabilities	2,685	2,685
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 9 months 18 days	3 years 9 months 18 days
Operating leases (years) (Year)	5 years	6 years