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Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
Inventory as of
 
(in thousands)
 
June 30, 2016
 
 
December 31, 2015
 
Unprocessed
  $ 169,296     $ 163,942  
Processed and finished
    41,488       42,703  
Totals
  $ 210,784     $ 206,645