Financial Risk Management - Disclosure of Financial Risk Management (Details) - NZD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Statement Line Items [Line Items]
Non-derivatives Borrowings	$ 48,860	$ 21,697
Non-derivatives Trade payables	10,407	23,580
Non-derivatives Total	59,267	45,277
Derivatives Gross future cash settlement on forward currency contracts - inflow		32,912
Derivatives Gross future cash settlement on forward currency contracts - (outflow)		(34,395)
Derivatives Total		(1,483)
0 - 30 Days [Member]
Statement Line Items [Line Items]
Non-derivatives Borrowings	2,052	1,329
Non-derivatives Trade payables	10,407	23,580
Non-derivatives Total	12,459	24,908
Derivatives Gross future cash settlement on forward currency contracts - inflow		18,325
Derivatives Gross future cash settlement on forward currency contracts - (outflow)		(19,212)
Derivatives Total		(887)
Between One Month and Three Months [Member]
Statement Line Items [Line Items]
Non-derivatives Borrowings	18,044	184
Non-derivatives Trade payables
Non-derivatives Total	18,044	184
Derivatives Gross future cash settlement on forward currency contracts - inflow		9,610
Derivatives Gross future cash settlement on forward currency contracts - (outflow)		(10,061)
Derivatives Total		(451)
Between Three Months and One Year [Member]
Statement Line Items [Line Items]
Non-derivatives Borrowings		20,184
Non-derivatives Trade payables
Non-derivatives Total		20,184
Derivatives Gross future cash settlement on forward currency contracts - inflow		4,976
Derivatives Gross future cash settlement on forward currency contracts - (outflow)		(5,121)
Derivatives Total		(145)
Between One Year and Five Years [Member]
Statement Line Items [Line Items]
Non-derivatives Borrowings	28,764
Non-derivatives Trade payables
Non-derivatives Total	28,764
Derivatives Gross future cash settlement on forward currency contracts - inflow
Derivatives Gross future cash settlement on forward currency contracts - (outflow)
Derivatives Total

The amount of future cash inflows on settlement of derivatives.

No definition available.

Name:	NAKD_DerivativesGrossFutureCashInflowsOfSettlementOnForwardCurrencyContracts
Namespace Prefix:	NAKD_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of future cash outflows on settlement of derivatives.

+ References

No definition available.

+ Details

Name:	NAKD_DerivativesGrossFutureCashOutflowsOfSettlementOnForwardCurrencyContracts
Namespace Prefix:	NAKD_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- Definition

The amount of contractual undiscounted cash flows in relation to bonds issued. [Refer: Bonds issued]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph B11D
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_B11D&doctype=Appendix&subtype=B
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph IG31A
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_BondsIssuedUndiscountedCashFlows
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of contractual undiscounted cash flows in relation to derivative financial liabilities. [Refer: Derivative financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 39
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_39_b&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DerivativeFinancialLiabilitiesUndiscountedCashFlows
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of contractual undiscounted cash flows in relation to non-derivative financial liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 39
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_39_a&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of contractual undiscounted cash flows in relation to trade and other payables. [Refer: Trade and other payables]

+ References

+ Details

Name:	ifrs-full_TradeAndOtherPayablesUndiscountedCashFlows
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneMonthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneMonthAndNotLaterThanThreeMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeMonthsAndNotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: