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SHAREHOLDERS' EQUITY (Schedule of Information about Share Options Outstanding) (Details) - $4.42- $13.20 [Member]
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number outstanding | shares 580,185
Outstanding, Weighted-average remaining contractual life 3 years 9 months 14 days
Outstanding, Weighted average exercise price $ 9.64
Number exercisable | shares 459,662
Exercisable, Weighted average exercise price $ 8.51
Exercise price, minimum 4.42
Exercise price, maximum $ 21.30