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Inventories (Tables)
9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventories were as follows (in thousands):

 

     September 30, 2017      December 31, 2016  

Raw materials

   $ 26,247      $ 18,648  

Work-in-process

     2,774        3,361  

Finished goods

     4,862        5,127  
  

 

 

    

 

 

 

Net balance

   $ 33,883      $ 27,136