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Derivative on Convertible Notes - Disclosure of Detailed Information About Derivative on Convertible Notes (Details) - NZD ($) $ in Thousands | Jan. 31, 2019 | Jan. 31, 2018 | Jan. 31, 2017
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Disclosure Of Derivative On Convertible Notes [Abstract] |  |  |
Derivative on Convertible Notes |  | $ 1,110 | $ 4,112

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

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