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Note 10 - Lines of Credit (Details Textual) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Dec. 04, 2015
The Bankers' Bank of Kentucky [Member]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 5,000,000
Long-term Line of Credit $ 0 $ 0  
Stock Yards & Trust Company [Member] | Revolving Credit Facility [Member]      
Long-term Line of Credit $ 2,000,000 $ 2