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Note 7 - Deferred Finance Charges (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Debt Issuance Costs, Noncurrent, Net $ 540,414 $ 1,879,537  
Debt Issuance Costs, Gross 7,055,914 6,343,300  
Amortization of Debt Issuance Costs $ 715,587 $ 587,157 $ 656,341