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SIGNIFICANT ACCOUNTING POLICIES (Schedule Of Stock Option Granted Assumptions) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]      
Dividend yield 0.00% 0.00% 0.00%
Volatility, minimum 53.00% 53.00% 53.00%
Volatility, maximum 65.00% 62.00% 69.00%
Risk free interest, minimum 1.20% 1.80% 0.80%
Risk free interest, maximum 2.70% 2.90% 2.20%
Early exercise multiple, minimum 1.30 2.00 2.10
Early exercise multiple, maximum 2.30 2.30 2.20