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Note 13 - Leases - Operating Lease Balance Sheet Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Operating lease cost $ 53,723 $ 107,445  
Total lease cost 53,723 107,445  
Operating ROU assets   552,954  
Operating lease liabilities, current portion 204,282 204,282 $ 170,560
Operating lease liabilities, non-current portion 346,064 346,064 $ 390,466
Total $ 550,346 $ 550,346  
Weighted average remaining lease term (in years) – operating leases (Year) 2 years 273 days 2 years 273 days  
Weighted average discount rate – operating leases 5.50% 5.50%