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CASH AND CASH EQUIVALENTS (Schedule of Cash and Equivalents) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Cash and cash equivalents [abstract]        
Cash for immediate withdrawal in USD $ 2,609 $ 1,741    
Cash equivalents in NIS bank deposit 1,170    
Cash for immediate withdrawal in NIS 748 281    
Cash for immediate withdrawal in Euro and other currencies 78 44    
Cash and cash equivalents $ 3,435 $ 3,236 $ 10,221 $ 5,213