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v3.20.1

Cash Flow Information - Schedule of Non-cash Investing and Financing Activities (Details) - NZD ($) $ in Thousands | 12 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Onerous contracts |  |  |
Shares issued in lieu of inventory payment | $ 15,525 |  |
Warrants issued | 371 |  |
Non-cash investing and financing activities | $ 15,896 |  |

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

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- Definition The fair value of warrants issued in noncash investing or financing activities. + References No definition available. + Details
Name: | NAKD_FairValueOfWarrantsIssued
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Non-cash investing and financing activities, + References No definition available. + Details
Name: | NAKD_NoncashInvestingAndFinancingActivities
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Shares issued in lieu of inventory payment. + References No definition available. + Details
Name: | NAKD_SharesIssuedInLieuOfInventoriesPayment
Namespace Prefix: | NAKD_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration