Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Derivative Warrants Liability (Details 1)

v3.19.1
Derivative Warrants Liability (Details 1) - $ / shares
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Share price (U.S. dollars) [1]     $ 0.15
Series (2015) [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Share price (U.S. dollars) $ 0.094 $ 0.59  
Exercise price (U.S. dollars) $ 0.5 $ 0.5  
Expected volatility 63.00% 67.00%  
Risk-free interest rate 2.92% 1.00%  
Dividend yield 0.00% 0.00%  
Expected term (years) 2 years 4 months 24 days 4 months 13 days  
Series (2016) [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Share price (U.S. dollars) $ 0.094 $ 0.59  
Exercise price (U.S. dollars) $ 0.5 $ 0.5  
Expected volatility 63.00% 67.00%  
Risk-free interest rate 2.92% 1.00%  
Dividend yield 0.00% 0.00%  
Expected term (years) 5 months 20 days 9 months 7 days  
Series (2018) [Member]      
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]      
Share price (U.S. dollars) $ 0.094    
Exercise price (U.S. dollars) $ 0.125    
Expected volatility 63.00%    
Risk-free interest rate 2.92%    
Dividend yield 0.00%    
Expected term (years) 2 years 10 months 17 days    
[1] The Common Stock price, per share reflects the Company's management's estimation of the fair value per share of Common Stock. In reaching its estimation for 2016 grants, management considered, among other things, the valuation of the issuance of the shares under the private placement (see Note 11F above)