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SIGNIFICANT ACCOUNTING POLICIES (Details 2)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Data Related to Options to Purchase the Company Shares [Line Items]      
Dividend yield 0.00% 0.00% 0.00%
Forfeiture rate 2.00% 2.00% 2.00%
Maximum [Member]      
Data Related to Options to Purchase the Company Shares [Line Items]      
Risk free interest rate 1.39% 1.00% 1.62%
Expected volatility 57.73% 60.84% 49.78%
Expected term (in years) 5 years 6 months 5 years 6 months 5 years 6 months
Minimum [Member]      
Data Related to Options to Purchase the Company Shares [Line Items]      
Risk free interest rate 0.86% 0.80% 1.29%
Expected volatility 52.25% 55.81% 51.47%
Expected term (in years) 4 years 4 years 4 years