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Inventories (Tables)
9 Months Ended
Sep. 30, 2016
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventories are comprised of the following:

 

     September 30,      December 31,  
     2016      2015  

Component parts

   $ 8,639       $ 9,351   

Work-in-process and finished goods

     9,800         11,267   
  

 

 

    

 

 

 

Total

   $ 18,439       $ 20,618