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

Deferred income taxes (Schedule of Balance of Temporary Differences for Deferred Income Tax Asset Recognized) (Details)

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Deferred income taxes (Schedule of Balance of Temporary Differences for Deferred Income Tax Asset Recognized) (Details) - CAD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Major components of tax expense (income) [abstract]    
Non-capital losses $ 63,230 $ 43,719
Scientific research and experimental development expenditures 20,096 13,906
Non-refundable investment tax credits 3,832 2,801
Deductible share issuance costs 2,028 1,846
Long-term debt 7,612 6,243
Property and equipment $ 725 $ 1,144