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ENTITY-WIDE DISCLOSURE (Schedule of Total Revenues by Geographical Location) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues $ 93,178 $ 106,527 $ 95,794
Product [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 23,151 36,053 30,431
Service [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 70,027 70,474 65,363
Israel [Member] | Product [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 2,893 6,289 5,005
Israel [Member] | Service [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 4,031 3,704 2,665
United states [Member] | Product [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 13,013 19,004 18,350
United states [Member] | Service [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 41,019 40,047 39,596
Other [Member] | Product [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues 7,245 10,760 7,076
Other [Member] | Service [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Total revenues $ 24,977 $ 26,723 $ 23,102