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Operating Segments - Disclosure of Detailed Information About Geographical Information (Details) - NZD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2021 | Jan. 31, 2020 | Jan. 31, 2019
Statement Line Items [Line Items] |  |  |
Revenue | $ 80,039 | $ 90,065 | $ 111,920
New Zealand [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Revenue | 34,131 | 33,786 | 40,703
Australia [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Revenue | 21,011 | 24,365 | 32,065
United States [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Revenue | 24,432 | 30,863 | 34,156
Europe [Member] |  |  |
Statement Line Items [Line Items] |  |  |
Revenue | $ 465 | $ 1,051 | $ 4,996

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