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Changes in Accounting Policies - Disclosure of Detailed Information About Impact of Adoption of IFRS 16 (Details) - NZD ($)
$ in Thousands
Jan. 31, 2020
Feb. 02, 2019
Jan. 31, 2019
Changes In Accounting Policies      
Right-of-use assets $ 23,809 $ 26,158
Lease contribution provision   1,102  
Lease liabilities $ (25,831) (27,899)  
Net reduction in retained earnings   $ 639