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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

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