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Inventories
12 Months Ended
Dec. 31, 2013
Inventory Disclosure [Abstract]  
Inventories

6.  INVENTORIES

Inventories as of December 31 were as follows (in thousands):

 

     2013      2012  

Raw materials

   $ 19,744      $ 21,790  

Work-in-process

     3,979        2,630  

Finished goods

     5,973        5,535  
  

 

 

    

 

 

 

Net balance

   $ 29,696      $ 29,955