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Note 12 - Derivatives and Fair Value Disclosures - Financial Instruments (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Interest Rate Swap Agreements $ 263,635 $ 127,555
Derivatives 364,823 681,197
Derivatives 297,656
Designated as Hedging Instrument [Member]    
Total derivatives designated as hedging instruments 263,635 127,555
Derivatives 364,823 681,197
Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Interest Rate Swap Agreements 263,635 127,555
Derivatives 364,823 681,197
Not Designated as Hedging Instrument [Member]    
Derivatives   297,656
Derivatives  
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]    
Derivatives $ 297,656