| Schedule of ordinary shares and warrants | 
  
|   | 
  | 
Number of shares | 
  | 
 
|   | 
  | 
Registered | 
  | 
  | 
Issued and paid up | 
  | 
 
|   | 
  | 
December 31 | 
  | 
  | 
December 31 | 
  | 
 
|   | 
  | 
2018 | 
  | 
  | 
2017 | 
  | 
  | 
2018 | 
  | 
  | 
2017 | 
  | 
 
| Ordinary shares of par value NIS 0.03 | 
  | 
  | 
750,000,000 | 
  | 
  | 
  | 
500,000,000 | 
  | 
  | 
  | 
190,735,668 | 
  | 
  | 
  | 
166,816,328 | 
  | 
 
 
  
|   | 
  | 
Amount in NIS | 
  | 
 
|   | 
  | 
Registered | 
  | 
  | 
Issued and paid up | 
  | 
 
|   | 
  | 
December 31 | 
  | 
  | 
December 31 | 
  | 
 
|   | 
  | 
2018 | 
  | 
  | 
2017 | 
  | 
  | 
2018 | 
  | 
  | 
2017 | 
  | 
 
| Ordinary shares of par value NIS 0.03 | 
  | 
  | 
22,500,000 | 
  | 
  | 
  | 
15,000,000 | 
  | 
  | 
  | 
5,722,070 | 
  | 
  | 
  | 
5,004,490 | 
  | 
 
 
 
 | 
| Schedule of changes in number of options and weighted average exercise prices | 
|   | 
  | 
Year ended December 31, 2016 | 
  | 
  | 
Year ended December 31, 2017 | 
  | 
  | 
Year ended December 31, 2018 | 
  | 
 
|   | 
  | 
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 | 
  | 
  | 
45,532,659 | 
  | 
  | 
  | 
0.59 | 
  | 
  | 
  | 
32,888,472 | 
  | 
  | 
  | 
0.65 | 
  | 
  | 
  | 
40,644,792 | 
  | 
  | 
  | 
0.63 | 
  | 
 
| Granted | 
  | 
  | 
— | 
  | 
  | 
  | 
— | 
  | 
  | 
  | 
9,586,000 | 
* | 
  | 
  | 
0.56 | 
  | 
  | 
  | 
8,050,000 | 
  | 
  | 
  | 
0.57 | 
  | 
 
| Expired | 
  | 
  | 
(4,076,167 | 
) | 
  | 
  | 
0.6 | 
  | 
  | 
  | 
(1,065,305 | 
) | 
  | 
  | 
0.58-1.39 | 
  | 
  | 
  | 
(375,000 | 
) | 
  | 
  | 
0.6 | 
  | 
 
| Forfeited | 
  | 
  | 
(4,947,135 | 
) | 
  | 
  | 
0.35 | 
  | 
  | 
  | 
(764,375 | 
) | 
  | 
  | 
0.6 | 
  | 
  | 
  | 
(1,450,000 | 
) | 
  | 
  | 
0.44-0.6 | 
  | 
 
| Exercised | 
  | 
  | 
(3,620,885 | 
) | 
  | 
  | 
0.26 | 
  | 
  | 
  | 
— | 
  | 
  | 
  | 
— | 
  | 
  | 
  | 
- | 
  | 
  | 
  | 
  | 
  | 
 
| Outstanding at the end of the year | 
  | 
  | 
32,888,472 | 
  | 
  | 
  | 
0.65 | 
  | 
  | 
  | 
40,644,792 | 
  | 
  | 
  | 
0.63 | 
  | 
  | 
  | 
46,869,792 | 
  | 
  | 
  | 
0.63 | 
  | 
 
| Exercisable at the end of the year | 
  | 
  | 
14,350,118 | 
  | 
  | 
  | 
0.56 | 
  | 
  | 
  | 
20,922,506 | 
  | 
  | 
  | 
0.57 | 
  | 
  | 
  | 
27,936,172 | 
  | 
  | 
  | 
0.57 | 
  | 
 
 
  
 | 
* | 
Not including options to Directors and CEO which were subject to shareholder approval. | 
  
 
 | 
| Schedule of information about the exercise price and remaining contractual life of outstanding options | 
| December 31, 2016 | 
  | 
  | 
December 31, 2017 | 
  | 
  | 
December 31, 2018 | 
  | 
 
| Number of outstanding options | 
  | 
  | 
Exercise price range in NIS | 
  | 
  | 
Weighted average of the remaining contractual life | 
  | 
  | 
Number of outstanding options | 
  | 
  | 
Exercise price range in NIS | 
  | 
  | 
Weighted average of the remaining contractual life | 
  | 
  | 
Number of outstanding options at the end of the year | 
  | 
  | 
Exercise price range in NIS | 
  | 
  | 
Weighted average of the remaining contractual life | 
  | 
 
|   | 
32,888,472 | 
  | 
  | 
  | 
0.26 - 1.39 | 
  | 
  | 
  | 
7.72 | 
  | 
  | 
  | 
40,644,792 | 
  | 
  | 
  | 
0.26 - 1.39 | 
  | 
  | 
  | 
6.78 | 
  | 
  | 
  | 
46,869,792 | 
  | 
  | 
  | 
  0-1.39 | 
  | 
  | 
  | 
5.81 | 
  | 
 
 
 
 |