Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Share capital (Schedule of Share Capital) (Details)

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Share capital (Schedule of Share Capital) (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of classes of share capital [line items]    
Balance $ 6,343 $ 6,983
Stock options exercised 391 108
Warrants exercised 4,889 1,697
Balance 4,317 6,343
Share Capital [Member]    
Disclosure of classes of share capital [line items]    
Balance $ 70,113 $ 58,154
Issued and outstanding Begning Balance, shares 40,319,941 36,817,328
Issued for cash, net of issuance costs $ 12,895 $ 8,803
Issued for cash, net of issuance costs, shares 2,246,094 2,403,846
Stock options exercised $ 1,444 $ 1,265
Stock options exercised, shares 480,754 316,538
DSUs redeemed $ 220  
DSUs redeemed, shares 29,713  
Warrants exercised $ 5,480 $ 1,891
Warrants exercised, shares 2,029,899 782,229
Balance $ 90,152 $ 70,113
Issued and outstanding Ending Balance, shares 45,106,401 40,319,941