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Provisions - Disclosure of Detailed Information About Reconciliation of Changes in Other Provisions (Details) - NZD ($)
$ in Thousands
7 Months Ended 12 Months Ended
Jan. 31, 2017
Jan. 31, 2019
Jan. 31, 2018
DisclosureOfProvisionsLineItems [Line Items]      
Opening balance $ 3,410 $ 3,817 $ 3,777
Additional provisions recognised 1,006 1,054 1,230
Unused amounts reversed (112) (600) (658)
Unwinding of discounts (9) (84) 271
Amounts used during the period (499) (774) (913)
Exchange differences (19) (120) 110
Ending Balance 3,777 3,293 3,817
Lease Contributions Provision [Member]      
DisclosureOfProvisionsLineItems [Line Items]      
Opening balance 1,318 1,322 1,182
Additional provisions recognised 145 337 635
Unused amounts reversed
Unwinding of discounts
Amounts used during the period (269) (510) (547)
Exchange differences (12) (64) 52
Ending Balance 1,182 1,085 1,322
Onerous Contracts Provision [Member]      
DisclosureOfProvisionsLineItems [Line Items]      
Opening balance 275 264 553
Additional provisions recognised 508
Unused amounts reversed
Unwinding of discounts
Amounts used during the period (230) (264) (289)
Exchange differences
Ending Balance 553 264
Make Good Provision [Member]      
DisclosureOfProvisionsLineItems [Line Items]      
Opening balance 1,817 2,231 2,042
Additional provisions recognised 353 717 595
Unused amounts reversed (112) (600) (658)
Unwinding of discounts (9) (84) 271
Amounts used during the period (77)
Exchange differences (7) (56) 58
Ending Balance $ 2,042 $ 2,208 $ 2,231