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Consolidated statements of changes in equity - USD ($) shares in Thousands, $ in Thousands | Share capital [Member] | Equity reserve [Member] | Foreign currency translation reserve [Member] | Changes in fair value of available-for-sale investment [Member] | Deficit [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2015 | $ 181,143 | $ 28,452 | $ 7,788 |  | $ (152,538) | $ 64,845
Balance, shares at Dec. 31, 2015 | 28,935 |  |  |  |  |
Net loss for the year |  |  |  |  | (5,207) | (5,207)
Other comprehensive income (loss) for the year |  |  | (1,334) | 237 | 1,607 | 510
Share-based payments |  | 585 |  |  |  | 585
Shares and warrants issued on private placement | $ 17,889 | 5,161 |  |  |  | 23,050
Shares and warrants issued on private placement, shares | 8,766 |  |  |  |  |
Proceeds from exercise of options and warrants | $ 3,159 | (1,149) |  |  |  | 2,010
Proceeds from exercise of options and warrants, shares | 1,839 |  |  |  |  |
Warrants issued and amended |  | 1,351 |  |  |  | 1,351
Balance at Dec. 31, 2016 | $ 202,191 | 34,400 | 6,454 | 237 | (156,138) | 87,144
Balance, shares at Dec. 31, 2016 | 39,540 |  |  |  |  |
Net loss for the year |  |  |  |  | (3,466) | (3,466)
Other comprehensive income (loss) for the year |  |  | (170) | (237) | (394) | (801)
Share-based payments |  | 1,956 |  |  |  | 1,956
Proceeds from exercise of options and warrants | $ 4,821 | (1,596) |  |  |  | 3,225
Proceeds from exercise of options and warrants, shares | 1,957 |  |  |  |  |
Balance at Dec. 31, 2017 | $ 207,012 | $ 34,760 | $ 6,284 |  | $ (159,998) | $ 88,058
Balance, shares at Dec. 31, 2017 | 41,497 |  |  |  |  |

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