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SHAREHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Vesting period 4 years    
Ordinary shares reserved for issuance 8,639,000    
Ordinary shares available for future grant 1,845,955    
Stock-based compensation expense $ 1,032 $ 619  
Unrecognized compensation cost related to non-vested stock options $ 1,462    
Unrecognized compensation cost, period for recognition 1 year    
Additional Shares authorized 1,600,000    
Minimum [Member]      
Expiration period 6 years    
Maximum [Member]      
Expiration period 10 years    
Stock Option [Member]      
Awards exercised during the period 314,384   237,410
Exercise price $ 1.75   $ 1.19
Stock Option [Member] | Employees and Directors [Member]      
Vesting period 4 years    
Awards granted during period 432,401    
Stock Option [Member] | Employees and Directors [Member] | Minimum [Member]      
Exercise price $ 1.95    
Stock Option [Member] | Employees and Directors [Member] | Maximum [Member]      
Exercise price $ 3.14    
Restricted Stock Units RSUs [Member]      
Awards granted during period    
Awards vested during the period 10,816   37,269