Note 11 - Commitments - Lease Expense (Details) - USD ($)		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Cash paid for operating lease liabilities		$ 32,694	$ 31,882
Cash paid for finance lease liabilities		2,685	2,685
Right-of-use assets obtained in exchange for new operating lease liabilities (1)	[1]		663,009
Property and equipment obtained in exchange for new finance lease liabilities			$ 43,242
Finance leases (years) (Year)		1 year 9 months 18 days	2 years 9 months 18 days
Operating leases (years) (Year)		4 years	5 years
Weighted-average discount rate – operating leases		9.20%	9.20%
Weighted-average discount rate – finance leases		9.20%	9.20%

[1] For the nine months ended September 30, 2021, the balance includes operating leases existing as of the adoption of ASC 842 on January 1, 2021