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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