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Financial instruments - Schedule of net US dollar exposure (Details) | Sep. 30, 2022 CAD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2021 CAD ($) | Sep. 30, 2020 CAD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2019 CAD ($)
--- | --- | --- | --- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Assets | $ 7,323,463 |  | $ 8,717,846 | $ 5,312,777 |  | $ 700,087
Liabilities | $ (8,326,354) |  | $ (2,594,118) | $ (1,427,913) |  | $ (931,483)
U.S. subsidiary [Member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Net U.S. dollar exposure |  | $ 34,623 |  |  |  |
U.S. dollar exposure [Member] |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Assets |  | 70,187 |  |  | $ 222,262 |
Liabilities |  | (1,015,090) |  |  | (88,019) |
Net U.S. dollar exposure |  | (979,526) |  |  | 134,243 |
Impact to profit or loss if 5% movement in the US dollar |  | $ (48,976) |  |  | $ 6,712 |

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