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Reserves (Tables)
 12 Months Ended
Jan. 31, 2019
Disclosure of reserves within equity [abstract]  
Disclosure of Detailed Information About Reserves Within Equity

    31 January 2019
NZ$000’s		     31 January 2018
NZ$000’s		     31 January 2017
NZ$000’s		  
Foreign currency translation reserve                        
Opening balance     (2,006 )     (2,154 )     (2,125 )
Transfers in     (7 )     148       (29 )
                         
Balance at the end of the year     (2,013 )     (2,006 )     (2,154 )