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Note 13 - Commitments - Lease Expense (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Cash paid for operating lease liabilities $ 31,999 $ 31,882 $ 95,996 $ 95,645
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) 2 years 3 months 18 days 5 years 6 months 2 years 3 months 18 days 5 years 6 months
Operating leases (years) (Year) 4 years 6 months 3 years 3 months 18 days 4 years 6 months 3 years 3 months 18 days