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Income taxes - Unrecognized tax assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Disclosure Of Income Tax [Abstract] |  |
Deductible temporary differences | $ 63,695 | $ 60,237
Non-capital losses | 587,407 | 394,067
Research and development expense, available for reduction of future taxable income | 21,760 | 15,456
Unrecognized tax assets | $ 672,862 | $ 469,760

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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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- Definition Disclosure Of Income Tax [Abstract] + References No definition available. + Details
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- Definition Research And Development Expense, Available For Reduction Of Future Taxable Income Not Subject To Expiration + References No definition available. + Details
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- Definition Unrecognized Tax Benefits + References No definition available. + Details
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