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Inventories
3 Months Ended
Mar. 31, 2013
Inventories [Abstract]  
Inventories
2.   Inventories

Inventories consisted of the following:

 

                 
    March 31,
2013
    December 31
2012
 

Work-in-process

  $ 12,044     $ 11,286  

Finished goods

    6,011       7,433  
   

 

 

   

 

 

 
    $ 18,055     $ 18,719