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v3.20.1

Intangible Assets - Disclosure of Detailed Information About Impairment of Indefinite-lived Brand Intangibles (Details) - NZD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2020 | Jan. 31, 2019
Statement Line Items [Line Items] |  |
Impairment of indefinite-lived brand intangibles | $ 3,694 | $ 4,563
Pleasure State [Member] |  |
Statement Line Items [Line Items] |  |
Impairment of indefinite-lived brand intangibles | 125 | 2,206
Davenport and Lovable [Member] |  |
Statement Line Items [Line Items] |  |
Impairment of indefinite-lived brand intangibles | 1,439 | 1,065
Naked [Member] |  |
Statement Line Items [Line Items] |  |
Impairment of indefinite-lived brand intangibles | $ 2,130 | $ 1,292

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

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- Definition Impairment of indefinite-lived brand intangibles. + References No definition available. + Details
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Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |