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Capital stock (Details 6) - CAD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Capital Stock [Abstract]      
Net profit (loss) $ 1,365 $ (727) $ (6,845)
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]      
Weighted average shares outstanding for basic loss per share 10,251,313 10,251,313 10,251,313
Weighted average shares outstanding for diluted loss per share 10,436,313 10,251,313 10,251,313