Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Intangible Assets - Disclosure of Detailed Information About Intangible Assets (Details)

v3.19.3.a.u2
Intangible Assets - Disclosure of Detailed Information About Intangible Assets (Details) - NZD ($)
$ in Thousands
Jul. 31, 2019
Jan. 31, 2019
Jul. 31, 2018
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill $ 32,431 $ 37,864 $ 17,287
Goodwill [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 2,320 2,399
Goodwill [Member] | At Cost [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 5,993 5,607  
Goodwill [Member] | Impairment [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill (5,993) (3,287)  
Patents and Licences [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 24,202 25,075 217
Patents and Licences [Member] | At Cost [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 27,157 25,993  
Patents and Licences [Member] | Accumulated Depreciation [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill (2,955) (918)  
Brands [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 8,229 10,205 14,395
Brands [Member] | At Cost [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 14,901 14,769  
Brands [Member] | Accumulated Depreciation [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill (6,672) (4,563)  
Software [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 263 $ 276
Software [Member] | At Cost [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill 15,716 15,718  
Software [Member] | Accumulated Depreciation [Member]      
Disclosure of detailed information about intangible assets [line items]      
Total intangible assets and goodwill $ (15,716) $ (15,455)