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Intangible Assets - Disclosure of Detailed Information About Impairment of Patents & Licences (Details)) - NZD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Statement Line Items [Line Items] |  |
Impairment of patents & licences | $ 2,037 |
Fredericks of Hollywood [Member] |  |
Statement Line Items [Line Items] |  |
Impairment of patents & licences | 1,914 |
Naked Patents & Licence [Member] |  |
Statement Line Items [Line Items] |  |
Impairment of patents & licences | $ 123 |

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- Definition Statement Line Items. + References No definition available. + Details
Name: | NAKD_IfrsStatementLineItems
Namespace Prefix: | NAKD_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Impairment of patents &amp; licences. + References No definition available. + Details
Name: | NAKD_ImpairmentOfPatentsLicences
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=NAKD_FredericksOfHollywoodFOHLicenceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=NAKD_NakedPatentsLicenceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |