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SHAREHOLDERS' EQUITY (Schedule of Stock Option Activity) (Details) - Employee [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Number of options    
Outstanding at January 1, 2019 2,883,410  
Granted 1,112,500  
Exercised (676,930)  
Forfeited (150,000)  
Outstanding at December 31, 2019 3,168,980 2,883,410
Exercisable at December 31, 2019 1,094,772  
Weighted-average exercise price    
Outstanding at January 1, 2019 $ 5.6  
Granted 9.3  
Exercised 5.1  
Forfeited 7.3  
Outstanding at December 31, 2019 6.9 $ 5.6
Exercisable at December 31, 2019 $ 4.6  
Weighted-average remaining contractual term    
Outstanding at December 31 3 years 9 months 18 days 3 years 8 months 12 days
Exercisable at December 31, 2019 2 years 3 months 19 days  
Aggregate intrinsic value    
Outstanding at January 1, 2019 $ 9,087  
Outstanding at December 31, 2019 4,795 $ 9,087
Exercisable at December 31, 2019 $ 3,590