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Provisions - Disclosure of Detailed Information About Provisions (Details) - NZD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
DisclosureOfProvisionsLineItems [Line Items]    
Current provisions $ 5,844 $ 921
Non-current provisions 1,796 2,372
Lease Contributions Provision [Member]    
DisclosureOfProvisionsLineItems [Line Items]    
Current provisions 179
Non-current provisions 906
Other Provision [Member]    
DisclosureOfProvisionsLineItems [Line Items]    
Current provisions 5,205
Make Good Provision [Member]    
DisclosureOfProvisionsLineItems [Line Items]    
Current provisions 639 742
Non-current provisions $ 1,796 $ 1,466