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Note 7 - Bank Debt - Summary of Loan Balances (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Total Bank Debt $ 8,533,384 $ 9,628,602
Less: current portion 5,088,939 1,333,333
Non-current bank debt 3,444,445 8,295,269
Less: unamortized debt costs 87,749 100,590
Net non-current bank debt 3,356,696 8,194,679
Term Debt [Member]    
Total Bank Debt 4,777,778 5,444,444
Line of Credit [Member]    
Total Bank Debt $ 3,755,606 $ 4,184,158