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ENTITY-WIDE DISCLOSURES (Tables)
 12 Months Ended
Dec. 31, 2017
ENTITY-WIDE DISCLOSURES [Abstract]  
Schedule of Revenues by Geographic Area
Revenues by geographical areas were as follows:

   
Year ended
December 31,
  
   
2017
    
2016
    
2015
  
                   
North America
  
$
45,940
    
$
38,769
    
$
36,236
  
Europe
    
10,570
      
11,342
      
7,795
  
APAC
    
4,321
      
3,337
      
2,838
  
Israel
    
703
      
535
      
662
  
Other
    
564
      
511
      
637
  
                         
   
$
62,098
    
$
54,494
    
$
48,168