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Financial Risk Management (Details Narrative)
 12 Months Ended
Jan. 31, 2019
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Description of foreign exchange rate It assumes a 10% change of the New Zealand Dollar / Australian Dollar exchange rate for the year ended 31 January 2019 (31 January 2018: 10%, 31 January 2017: 10%). A 10% change is considered for the New Zealand Dollar / US Dollar exchange rate (31 January 2018: 10%, 31 January 2017: 10%). A 10% change is considered for the New Zealand Dollar / GB Pound exchange rate (31 January 2018: 10%, 31 January 2017: 10%). A 10% change is considered for the New Zealand Dollar / Euro exchange rate (31 January 2018: 10%, 31 January 2017: 10%). All of these percentages have been determined based on the average market volatility in exchange rates in the previous 12 months.
AUD [Member]  
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Closing foreign exchange rate 0.9513
US [Member]  
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Closing foreign exchange rate 0.6903
GBP [Member]  
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Closing foreign exchange rate 0.5265
EUR [Member]  
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Closing foreign exchange rate 0.6008
HKD [Member]  
DisclosureOfFinancialRiskManagementLineItems [Line Items]  
Closing foreign exchange rate 5.4138