Note 11 - Commitments - Lease Expense (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Cash paid for operating lease liabilities	$ 34,320	$ 31,999	$ 98,083	$ 95,996
Cash paid for finance lease liabilities	$ 2,685	$ 2,685	$ 8,055	8,055
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)		1 year 3 months 18 days		1 year 3 months 18 days
Operating leases (years) (Year)		3 years 6 months		3 years 6 months
Weighted-average discount rate – operating leases	9.20%		9.20%
Weighted-average discount rate – finance leases	9.20%		9.20%