Note 8 - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Total lease cost	$ 48,543	$ 55,942	$ 111,682	$ 111,161
Operating lease right-of-use assets	84,610		84,610		$ 197,355
Operating lease liabilities, current portion	77,379		77,379		159,665
Operating lease liabilities, non-current portion	9,570		9,570		$ 37,829
Total operating lease liabilities	$ 86,949		$ 86,949
Weighted average remaining lease term (in years) – operating leases (Year)	11 months 4 days		11 months 4 days		11 months 15 days
Weighted average discount rate – operating leases	5.50%		5.50%		5.50%
Cash paid for amounts included in the measurement of operating lease liabilities for the six months ended June 30, 2023 and 2022:			$ 138,634	$ 144,985
2023 (6 months remaining)	$ 50,950		50,950
2024	38,808		38,808
Total future lease payments	89,758		89,758
Less: imputed interest	(2,809)		(2,809)
Total	86,949		86,949
Approximation [Member]
Operating lease right-of-use assets	84,610		84,610		$ 197,355
Total operating lease liabilities	86,949		86,949		197,494
Total	$ 86,949		$ 86,949		$ 197,494