XML 87 R147.htm IDEA: XBRL DOCUMENT v3.20.1
Financial Risk Management - Disclosure of Credit Risk Exposure (Details) - NZD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Without External Credit Ratings [Member]      
Statement Line Items [Line Items]      
Financial assets $ 3,747 $ 1,915 $ 10,685
Without External Credit Ratings [Member] | Trade Receivables [Member]      
Statement Line Items [Line Items]      
Financial assets 2,358 7,789 9,982
Without External Credit Ratings [Member] | Trade Receivables [Member] | New Customer Less than 6 Months [Member]      
Statement Line Items [Line Items]      
Financial assets 42 12
Without External Credit Ratings [Member] | Trade Receivables [Member] | Existing Customers (More Than 6 Months With Default in Past [Member]      
Statement Line Items [Line Items]      
Financial assets 2,358 7,747 9,970
Ratings AA- [Member]      
Statement Line Items [Line Items]      
Financial assets 3,747 1,915 10,591
Ratings A+ [Member]      
Statement Line Items [Line Items]      
Financial assets $ 94