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Income Tax Expense/(Benefit) - Disclosure of Detailed Information About Major Components of Tax Expense Income (Details) - NZD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Income taxes [Abstract]      
Current tax on profits for the period $ 28 $ (667) $ 537
Adjustments for current tax of prior periods 53 (607) (477)
Total current tax expense/(benefit) 81 (1,274) 60
Decrease in deferred tax assets (note 29) 701
Income tax expense/(benefit) for continuing operations $ 782 $ (1,274) $ 60