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Income taxes - Schedule of income tax recovery (Details) - CAD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2019
Major components of tax expense (income) [abstract]        
Current income tax recovery (expense): $ 0 $ 0 $ 0 $ 0
Deferred income tax (recovery) expense: 0 (49,442) 0 0
Income tax recovery: $ 0 $ (49,442) $ 0 $ 0