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Shareholders' Equity (Details) - Employee Stock Option [Member] - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price $ 1.02 $ 0.53
Expected volatility 66.00% 38.00%
Risk-free interest 0.48% 0.17%
Expected life of up to (years) 3 years 4 days 2 years 3 months 26 days
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Exercise price $ 1.08 $ 1.7
Expected volatility 69.00% 88.00%
Risk-free interest 0.83% 0.43%
Expected life of up to (years) 3 years 6 months 21 days 3 years 3 months 29 days