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Note 4 - Debt - Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Asset Based Revolving Credit Facility Due June 30, 2019 [Member]    
Revolver $ 163,516 $ 145,800
Industrial Revenue Bond Member [Member]    
IRB 1,825 2,690
Revolver 163,516 145,800
Total debt 165,341 148,490
Less current amount (1,825) (2,690)
Total long-term debt $ 163,516 $ 145,800