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Provisions (Details Narrative) - NZD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
DisclosureOfProvisionsLineItems [Line Items]    
Additional provisions, other provisions $ 5,512 $ 1,054
Make Good Provision [Member]    
DisclosureOfProvisionsLineItems [Line Items]    
Pre-tax discount rate applied to provisions calculations 2.00% 2.00%
Additional provisions, other provisions $ 307 $ 717