| Year ended December 31 | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| U.S. dollars in thousands, except per share data | ||||||||||||
| Basic and diluted: | ||||||||||||
| Loss attributable to equity holders of the Company | $ | 10,138 | $ | 16,002 | $ | 14,888 | ||||||
| Weighted average number of ordinary shares in issue | 27,398,169 | 24,970,585 | 20,309,596 | |||||||||
| Loss per ordinary share | $ | 0.37 | $ | 0.64 | $ | 0.73 | ||||||