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Financial Risk Management - Disclosure of Detailed Information About Hedging Instruments (Details) - Less than Six Months [Member] $ in Thousands | 12 Months Ended
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Jan. 31, 2021 NZD ($) Integer | Jan. 31, 2020 NZD ($) Integer | Jan. 31, 2019 NZD ($) Integer
Buy USD / Sell NZD [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Notional amounts | $ |  |  | $ 34,395
Average exchange rate | Integer |  |  | 0.6620
Buy AUD / Sell NZD [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Notional amounts | $ |  |  |
Average exchange rate | Integer |  |  |

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- Definition Statement Line Items + References No definition available. + Details
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- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
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