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Note 5 - Debt (Tables)
6 Months Ended
Jun. 30, 2015
Debt Disclosure [Abstract]  
Schedule of Debt [Table Text Block]
   

As of

 
   

June 30,

   

December 31,

 

(in thousands)

 

2015

   

2014

 

Asset-based revolving credit facility due June 30, 2019

  $ 209,395     $ 244,090  

Industrial revenue bond due April 1, 2018

    2,690       3,530  

Total debt

    212,085       247,620  

Less current amount

    (2,690 )     (3,530 )

Total long-term debt

  $ 209,395     $ 244,090