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Consolidated Statements of Changes in Equity - CAD ($) $ in Thousands | Share capital [Member] | Contributed surplus [Member] | AOCI [Member] | Deficit [Member] | Total
--- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2018 | $ 423,438 | $ 49,274 | $ 14,064 | $ (139,699) | $ 347,077
Statement [Line Items] |  |  |  |  |
Fair value of shares issued for Yellowhead acquisition | 12,629 |  |  |  | 12,629
Share-based compensation |  | 2,800 |  |  | 2,800
Exercise of options | 251 | (75) |  |  | 176
Settlement of performance share units |  | (377) |  |  | (377)
Total comprehensive income (loss) for the year |  |  | (7,237) | (53,382) | (60,619)
Ending balance at Dec. 31, 2019 | 436,318 | 51,622 | 6,827 | (193,081) | 301,686
Statement [Line Items] |  |  |  |  |
Common shares issued, net of issue costs | 34,299 |  |  |  | 34,299
Tax effect on share issue costs | 802 |  |  |  | 802
Share-based compensation |  | 2,244 |  |  | 2,244
Exercise of options | 1,451 | (433) |  |  | 1,018
Total comprehensive income (loss) for the year |  |  | 847 | (23,524) | (22,677)
Ending balance at Dec. 31, 2020 | $ 472,870 | $ 53,433 | $ 7,674 | $ (216,605) | $ 317,372

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