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Income Tax Expense/(Benefit) - Disclosure of Detailed Information About Tax Losses Not Recognised (Details) - NZD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Income taxes [Abstract] |  |  |
Unused tax losses for which no deferred tax asset has been recognised | $ 177,275 | $ 166,882 | $ 130,587
Potential tax benefit at 28% | $ 49,637 | $ 46,727 | $ 36,564

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- References No definition available. + Details
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- Definition The amount of potential tax benefit in connection with tax losses not recognized. + References No definition available. + 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 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + Details
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