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Intangible Assets - Disclosure of Detailed Information About Intangible Assets (Details) - NZD ($) $ in Thousands | Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | $ 22,849 | $ 28,293 | $ 37,863
Goodwill [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill |  |  | 2,320
Goodwill [Member] | At Cost [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 5,516 | 6,091 |
Goodwill [Member] | Accumulated Impairment [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | (5,516) | (6,091) |
Patents and Licences [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 19,214 | 21,662 | 25,075
Patents and Licences [Member] | At Cost [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 22,863 | 25,151 |
Patents and Licences [Member] | Accumulated Depreciation and Impairment [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | (3,649) | (3,489) |
Brands [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 3,443 | 6,631 | 10,205
Brands [Member] | At Cost [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 12,253 | 12,032 |
Brands [Member] | Accumulated Depreciation and Impairment [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | (8,810) | (5,401) |
Software & Website [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 192 |  | $ 263
Software & Website [Member] | At Cost [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | 15,749 | 15,548 |
Software & Website [Member] | Accumulated Depreciation and Impairment [Member] |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |
Total intangible assets and goodwill | $ (15,557) | $ (15,548) |

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- Definition The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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