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Loss for the Period - Disclosure of Detailed Information About Profit Loss from Operating Activities (Details) - NZD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Standby Letter Of Credit      
Staff costs $ 28,009 $ 31,380 $ 34,158
Depreciation of property, plant and equipment 1,338 2,151 2,724
Depreciation of right-of-use assets 8,676
Amortisation of acquired intangibles 589 231 306
Impairment of tangible assets (see note 15) 491 281  
Impairment of intangible assets (see note 17) 8,413 7,892 1,914
Loss on disposal of property, plant and equipment 322 232 362
Transaction expenses 9,597 9,267 3,322
Operating lease rentals - land and buildings 9,236 10,021
Operating lease rentals - other 524 786
Gain on sale of intangible assets (906)
Contract termination 4,696
Auditor's remuneration $ 679 $ 1,050 $ 513