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Note 10 - Lines of Credit (Details Textual) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 04, 2015
The Bankers' Bank of Kentucky [Member]      
Line of Credit Facility, Maximum Borrowing Capacity     $ 5,000
Long-term Line of Credit $ 0 $ 0  
Stock Yards & Trust Company [Member] | Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity 2,000 2,000  
Long-term Line of Credit $ 0 $ 0