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Note 21 - Derivative Financial Instruments - Summary of Derivative Financial Instruments (Details) - Interest Rate Swap [Member] - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Termination Date Feb. 28, 2025    
Notional Amount $ 50,000,000   $ 50,000,000
Rate Paid 2.12%    
Estimated Fair Value $ 1,271,538 $ 567,704