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Note 14 - Commitments - Lease Expense (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Cash paid for operating lease liabilities $ 31,882 $ 30,820 $ 95,645 $ 78,904
Cash paid for finance lease liabilities 2,658 2,685 8,055 76,622
Right-of-use assets obtained in exchange for new operating lease liabilities (1) [1] 0 0 0 (663,009)
Property and equipment obtained in exchange for new finance lease liabilities $ 0 $ 0 $ 0 $ (43,242)
Weighted-average remaining lease term - operating leases (years) (Year) 5 years 6 months 6 years 6 months 5 years 6 months 6 years 6 months
Weighted-average remaining lease term- finance leases (years) (Year) 3 years 3 months 18 days 4 years 3 months 18 days 3 years 3 months 18 days 4 years 3 months 18 days
[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