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Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   

Inventory as of

 

(in thousands)

 

June 30, 2015

   

December 31, 2014

 

Unprocessed

  $ 186,522     $ 238,226  

Processed and finished

    56,938       72,882  

Totals

  $ 243,460     $ 311,108