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Income taxes - Schedule of unrecognized deductible temporary differences (Details) - CAD ($) | Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2019
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Net operating loss carryforwards | $ 18,589,894 | $ 9,429,436 | $ 4,279,494 | $ 2,111,531
Unrecognized deductible temporary differences | 22,126,741 | 13,915,334 | 6,040,859 | 2,321,858
Share issuance costs [Member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Unrecognized deductible temporary differences | 1,298,783 | 1,810,927 | 1,496,239 | 17,281
Intangibles and development costs [Member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Unrecognized deductible temporary differences | 608,705 | 780,607 | 0 |
Scientific research and development expenditures [Member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Unrecognized deductible temporary differences | 1,583,058 | 1,789,571 | 218,235 | 170,940
Other [Member] |  |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |  |
Unrecognized deductible temporary differences | $ 46,300 | $ 104,793 | $ 46,891 | $ 22,106

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard -URIDate 2022-03-24 + Details
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