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

Inventories are comprised of the following:

 

     March 31,
2016
     December 31,
2015
 

Component parts

   $ 8,934       $ 9,351   

Work-in-process and finished goods

     9,090         11,267   
  

 

 

    

 

 

 

Total

   $ 18,024       $ 20,618