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

Contributed surplus (Schedule of Contributed Surplus) (Details)

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Contributed surplus (Schedule of Contributed Surplus) (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Balance $ 6,343 $ 6,983
Share-based compensation - stock options vested 1,182 571
Stock options exercised 391 108
Balance 4,317 6,343
Contributed Surplus [Member]    
Balance 6,375 6,961
Share-based compensation - stock options vested 1,182 571
Warrants expired  
Stock options exercised (1,053) (1,157)
Balance $ 6,504 $ 6,375