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Inventories (Tables)
 12 Months Ended
Dec. 31, 2013
Inventories  
Schedule of major classes of inventories

Our major classes of inventories were as follows as of December 31, 2013 and 2012 (in thousands):

 
   December 31,  
 
   2013   2012  

Raw materials

   $ 3,157   $ 2,652  

Work in process

     8,322     2,524  

Finished goods

     5,738     7,275  
           
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Total inventories

   $ 17,217   $ 12,451  
           
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