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Provisions - Disclosure of Detailed Information About Reconciliation of Changes in Other Provisions (Details) - NZD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Statement Line Items [Line Items]    
Opening balance $ 7,640 $ 3,293
Impact of IFRS 16   (1,102)
Additional provisions recognised 26 5,512
Amounts used during the period (5,619) (80)
Exchange differences 35 1
Ending Balance 2,082 7,640
Other Provisions [Member]    
Statement Line Items [Line Items]    
Opening balance 5,205
Impact of IFRS 16  
Additional provisions recognised 5,205
Amounts used during the period (5,113)
Exchange differences
Ending Balance 92 5,205
Make Good [Member]    
Statement Line Items [Line Items]    
Opening balance 2,435 2,208
Impact of IFRS 16  
Additional provisions recognised 26 307
Amounts used during the period (506) (64)
Exchange differences 35 (16)
Ending Balance 1,990 2,435
Lease Contributions Provision [Member]    
Statement Line Items [Line Items]    
Opening balance 1,085
Impact of IFRS 16   (1,102)
Additional provisions recognised
Amounts used during the period
Exchange differences 17
Ending Balance