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New accounting standards and amendments (Narrative) (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disclosure of initial application of standards or interpretations [abstract] |  |
Pre-commercial revenues | $ 7,275 | $ 0

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- Definition Pre-commercial revenues. + References No definition available. + Details
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