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INVENTORIES (Tables)
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories are comprised of the following:

   
December 31,
 
   
2017
   
2016
 
             
Raw materials, parts and supplies
 
$
7,367
   
$
6,461
 
Work in progress
   
10,300
     
6,541
 
Finished products
   
11,186
     
8,467
 
                 
   
$
28,853
   
$
21,469