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Note 4 - Debt - Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Revolver $ 192,971 $ 164,599
Total debt 194,796 166,424
Less current amount (1,825) (1,825)
Total long-term debt 192,971 164,599
Industrial Revenue Bond Member [Member]    
IRB 1,825 1,825
Asset Based Revolving Credit Facility Due June 30, 2019 [Member]    
Revolver $ 192,971 $ 164,599