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Borrowings - Disclosure of Detailed Information About Borrowings (Details) - NZD ($) $ in Thousands | Jan. 31, 2021 | Jan. 31, 2020
--- | --- | ---
Schedule Of Fair Value Measurement Of Assets And Liabilities [Text Block] |  |
Bank loans | $ 14,500 | $ 17,900
Debt issuance costs in relation to bank loan | (7) |
Other loan |  | 1,315
Amounts due in less than one year | 14,493 | 19,215
Convertible notes | 3,002 | 19,698
Amounts due after more than one year | 3,002 | 19,698
Borrowings | $ 17,495 | $ 38,913

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- Definition Amounts due after more than one year. + References No definition available. + Details
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Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amounts due in less than one year. + References No definition available. + Details
Name: | NAKD_BorrowingsLessThanOneYear
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of current convertible notes. + References No definition available. + Details
Name: | NAKD_CurrentConvertibleNotes
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of debt issuance costs in relation to bank loan. + References No definition available. + Details
Name: | NAKD_DebtIssuanceCostsInRelationToBankLoan
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | NAKD_DisclosureOfBorrowingsAbstract
Namespace Prefix: | NAKD_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of current secured bank loans received and the current portion of non-current secured bank loans received. [Refer: Secured bank loans received] + 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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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of borrowings that the entity does not separately disclose in the same statement or note. [Refer: Borrowings] + 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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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant