Note 11 - Commitments - Lease Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash paid for operating lease liabilities	$ 31,882	$ 31,999	$ 63,763	$ 63,881
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		663,009
Property and equipment obtained in exchange for new finance lease liabilities		$ 43,242		$ 43,242
Finance leases (years) (Year)		1 year 6 months		1 year 6 months
Operating leases (years) (Year)		3 years 9 months		3 years 9 months
Weighted-average discount rate – operating leases		9.20%		9.20%