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Inventory (Tables)
9 Months Ended
Sep. 30, 2012
Inventory [Abstract]  
Reconciliation of Inventories
                 
    September 30,
2012
    December 31,
2011
 
    (Unaudited)        

Raw materials

  $ 21,109     $ 19,719  

Work in process

    15,731       13,093  

Finished goods

    4,847       7,451  

Reserve for excess and obsolete inventory

    (5,811     (6,642
   

 

 

   

 

 

 
    $ 35,876     $ 33,621