Note 11 - Commitments - Lease Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Cash paid for operating lease liabilities	$ 33,390	$ 31,882	$ 65,272	$ 63,763
Cash paid for finance lease liabilities	$ 2,685	$ 2,685	$ 5,370	$ 5,370
Finance leases (years) (Year)	6 months 18 days	1 year 6 months	6 months 18 days	1 year 6 months
Operating leases (years) (Year)	2 years 9 months	3 years 9 months	2 years 9 months	3 years 9 months
Weighted-average discount rate – operating leases	9.20%	9.20%	9.20%	9.20%
Weighted-average discount rate – finance leases	9.20%	9.20%	9.20%	9.20%