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Investments in associates (Narrative) (Details) - CAD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 13, 2022 | Sep. 30, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Statement [Line Items] |  |  |  |  |
Proceeds from euity interests |  |  | $ 0 | $ 0 | $ 152
Share-based compensation expense |  |  | 1,013 | 1,059 | 1,206
Dolly Varden [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Common shares sold | 17,000,000 |  |  |  |
Proceeds from euity interests | $ 6,800 |  |  |  |
Investment in shares classified as an asset held for sale |  | 17,000,000 |  |  |
Impairment expense |  | $ 5,506 | 5,506 |  |
Fair market value |  |  | 51,769 | 53,554 |
Percentage of voting equity interests acquired | 22.20% |  |  |  |
UMS [Member] |  |  |  |  |
Statement [Line Items] |  |  |  |  |
Outstanding balance |  |  | 103 | 240 |
Future Rental Expense |  |  | 381 |  |
Share-based compensation expense |  |  | $ 317 | $ 483 | $ 453

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