Note 9 - Leases - Maturities of Lease Liabilities (Details) - USD ($)
Jun. 30, 2019
Apr. 01, 2019
2020 $ 131,163  
2021 133,299  
Total lease payments 264,462  
Imputed lease interest (6,474)  
Total lease liabilities $ 257,988 $ 298,983