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Intangible Assets - Disclosure of Detailed Information About Impairment of Patents & Licences (Details)) - NZD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Statement Line Items [Line Items]    
Impairment of patents & licences $ 2,037
Fredericks of Hollywood [Member]    
Statement Line Items [Line Items]    
Impairment of patents & licences 1,914
Naked Patents & Licence [Member]    
Statement Line Items [Line Items]    
Impairment of patents & licences $ 123