Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Trade and Other Receivables - Analysis of Age of Financial Assets That are Past Due but Not Impaired (Details)

v3.19.2
Trade and Other Receivables - Analysis of Age of Financial Assets That are Past Due but Not Impaired (Details) - NZD ($)
$ in Thousands
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables $ 7,789 $ 9,982 $ 26,499
0 - 30 Days [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 5,577 7,945 14,883
31 - 60 Days [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 852 335 2,566
61 - 90 Days [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 101    
61 - 90 Days [Member] | Past Due Not Impaired [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 101 489 2,166
61 - 90 Days [Member] | Considered Impaired [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables
> 90 Days [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 1,259    
> 90 Days [Member] | Past Due Not Impaired [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables 3,295 1,213 6,884
> 90 Days [Member] | Considered Impaired [Member]      
TradeAndOtherReceivablesLineItems [Line Items]      
Trade receivables $ (2,036)