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Note 9 - Accumulated Other Comprehensive Loss (Details Textual) - USD ($)
$ in Millions
1 Months Ended
Jun. 30, 2012
Dec. 31, 2015
Term Loan Member [Member] | London Interbank Offered Rate (LIBOR) [Member] | A B L Credit Facility [Member]    
Long-term Line of Credit $ 53.2  
Interest Rate Swap [Member]    
Long-term Line of Credit   $ 31.4
Fixed Rate Interest Hedge Notional Monthly Decrease $ 0.7