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Inventories
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories

6.  INVENTORIES

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

 

     2015      2014  

Raw materials

   $ 16,257       $ 18,252   

Work-in-process

     2,879         3,339   

Finished goods

     4,306         4,737   
  

 

 

    

 

 

 

Net balance

   $ 23,442       $ 26,328