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Note 15 - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Operating lease cost $ 63,973 $ 127,946  
Total lease cost 63,973 127,946  
Operating ROU assets 372,303 372,303 $ 487,325
Operating lease liabilities, current portion 221,399 221,399 234,309
Operating lease liabilities, non-current portion 162,373 162,373 $ 264,163
Total operating lease liabilities $ 383,772 $ 383,772  
Weighted average remaining lease term (in years) – operating leases (Year) 1 year 9 months 29 days 1 year 9 months 29 days  
Weighted average discount rate – operating leases 5.50% 5.50%