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Intangible Assets - Disclosure of Information for Cash-generating Units (Details) - NZD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2019 | Jan. 31, 2018 | Jan. 31, 2017
Disclosure of detailed information about intangible assets [line items] |  |  |
Impairment expense | $ 2,320 |  |
United States [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Impairment expense | $ 2,320 |  |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2018-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B67_d_v&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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- Details
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