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Critical accounting estimates and judgments (Narrative) (Details) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Critical Accounting Estimates And Judgment [Abstract]      
Net refund amounts $ 307    
Principal Amount 304    
Interest amount 3    
Income tax recovery $ 289 $ 187 $ 3,835