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Fair Value Measurements - Additional Information (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2026 | Jan. 31, 2026
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Transfers into level 1 to level 2, assets | $ 0 |
Transfers into level 2 to level 1, assets | 0 |
Transfers into level 1 to level 2, liabilities | 0 |
Transfers into level 2 to level 1, liabilities | 0 |
Transfers into level 3, assets | 0 |
Transfers out of level 3, assets | 0 |
Transfers into level 3, liabilities | 0 |
Transfers out of level 3, liabilities | 0 |
Investment in venture capital funds | 500,000 | $ 17,500,000
Impairment charges or observable price changes related venture funds | $ 0 |
Short-term investment |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items] |  |
Fair value, investment | The fair value of the short-term investment, which is a guaranteed investment certificate, is based on its purchase price plus one half of one percent calculated annually. |

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