| Schedule of ordinary shares and warrants |   
|  |  |  | Number of shares |  |  
|  |  |  | Registered |  |  | Issued and paid up |  |  
|  |  |  | December 31 |  |  | December 31 |  |  
|  |  |  | 2017 and 2016 |  |  | 2017 |  |  | 2016 |  |  
|  | Ordinary shares of par value NIS 0.03 |  |  | 500,000,000 |  |  |  | 166,816,328 |  |  |  | 107,128,864 |  |    
|  |  |  | Amount in NIS |  |  
|  |  |  | Registered |  |  | Issued and paid up |  |  
|  |  |  | December 31 |  |  | December 31 |  |  
|  |  |  | 2017 and 2016 |  |  | 2017 |  |  | 2016 |  |  
|  | Ordinary shares of par value NIS 0.03 |  |  | 15,000,000 |  |  |  | 5,004,490 |  |  |  | 3,213,866 |  |  | 
| Schedule of changes in number of options and weighted average exercise prices | 
|  |  | Year ended December 31, 2015
 |  |  | Year ended December 31, 2016
 |  |  | Year ended December 31, 2017
 |  |  
|  |  | No. of options
 |  |  | Weighted average of
 exercise
 price
 |  |  | No. of options
 |  |  | Weighted average of
 exercise
 price
 |  |  | No. of options
 |  |  | Weighted average of
 exercise
 price
 |  |  
| Outstanding at the beginning of the year |  |  | 17,963,346 |  |  |  | 0.56 |  |  |  | 45,532,659 |  |  |  | 0.59 |  |  |  | 32,888,472 |  |  |  | 0.65 |  |  
| Granted |  |  | 28,100,000 |  |  |  | 0.61 |  |  |  | — |  |  |  | — |  |  |  | *9,586,000 |  |  |  | 0.56 |  |  
| Expired |  |  | (318,894 | ) |  |  | 0.44 |  |  |  | (4,076,167 | ) |  |  | 0.6 |  |  |  | (1,065,305 | ) |  |  | 0.58-1.39 |  |  
| Forfeited |  |  | (119,748 | ) |  |  | 0.84 |  |  |  | (4,947,135 | ) |  |  | 0.35 |  |  |  | (764,375 | ) |  |  | 0.6 |  |  
| Exercised |  |  | (92,045 | ) |  |  | 0.3 |  |  |  | (3,620,885 | ) |  |  | 0.26 |  |  |  | — |  |  |  | — |  |  
| Outstanding at the end of the year |  |  | 45,532,659 |  |  |  | 0.59 |  |  |  | 32,888,472 |  |  |  | 0.65 |  |  |  | 40,644,792 |  |  |  | 0.63 |  |  
| Exercisable at the end of the year |  |  | 11,700,665 |  |  |  | 0.49 |  |  |  | 14,350,118 |  |  |  | 0.56 |  |  |  | 20,922,506 |  |  |  | 0.57 |  |    
| * | Not including options to Directors and CEO which are subject to shareholder approval |  | 
| Schedule of information about the exercise price and remaining contractual life of outstanding options | 
| December 31, 2015 |  |  | December 31, 2016 |  |  | December 31, 2017 |  |  
| Number of outstanding options |  |  | Exercise price range |  |  | Weighted average of the remaining contractual life |  |  | Number of outstanding options |  |  | Exercise price range |  |  | Weighted average of the remaining contractual life |  |  | Number of outstanding options at the end of the year |  |  | Exercise price range |  |  | Weighted average of the remaining contractual life |  |  
|  | 45,532,659 |  |  |  | 0.26 - 1.39 |  |  |  | 8.28 |  |  |  | 32,888,472 |  |  |  | 0.26 - 1.39 |  |  |  | 7.72 |  |  |  | 40,644,792 |  |  |  | 0.26 - 1.39 |  |  |  | 6.78 |  |  |