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Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2024 | Jan. 31, 2023 | Jan. 31, 2022
Class Of Stock [Line Items] |  |  |
Preference shares, shares authorized | 20,000,000 | 20,000,000 |
Preference shares, par value | $ 0.00045 | $ 0.00045 |
Preference shares, shares issued | 0 | 0 |
Preference shares, shares outstanding | 0 | 0 |
Stock repurchase program, expiration date | Jun. 30, 2024 |  |
Stock repurchased, shares | 0 | 0 | 0
Stock Repurchase Program $50.0 Million Authorization [Member] |  |  |
Class Of Stock [Line Items] |  |  |
Amount available under stock repurchase program | $ 49.0 |  |

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