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Note 3 - Inventories (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
 
 
Inventory as of
 
(in thousands)
 
March 31, 2016
 
 
December 31, 2015
 
Unprocessed
  $ 151,019     $ 163,942  
Processed and finished
    38,795       42,703  
Totals
  $ 189,814     $ 206,645