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SHAREHOLDERS EQUITY (Options Granted to Employees) (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Intrinsic value of options exercised during the period | $ $ 134
Employee [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average fair value of stock options granted | $ / shares $ 1.57