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Fair Value Loss on Convertible Notes Derivative and Warrants (Details Narrative) - NZD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Fair Value Loss On Convertible Notes Derivative And Warrants |  |  |
Fair value loss on convertible notes derivative and warrants | $ 26,552 |  | $ 775

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- Definition The amount of fair value gain loss on convertible notes derivative. + References No definition available. + Details
Name: | NAKD_FairValueLossOnConvertibleNotesDerivativeAndWarrants
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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