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ENTITY-WIDE DISCLOSURE (Schedule of Long-Lived Assets by Geographical Location) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 21,321 $ 21,298
Israel [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets 12,395 12,349
United states [Member]    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Long-Lived Assets $ 8,926 $ 8,949