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Inventories (Tables)
12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Summary of Inventories

Inventory is comprised of the following:

 

     December 31,  
     2016      2015  

Component parts

   $ 8,360      $ 9,351  

Work-in-process and finished goods

     9,060        11,267  
  

 

 

    

 

 

 

Total

   $ 17,420      $ 20,618