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Cash Equivalents and Short Term Investments - Additional Information (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 31, 2023 USD ($) investment | Jul. 31, 2022 USD ($) | Jul. 31, 2023 USD ($) investment | Jul. 31, 2022 USD ($) | Jan. 31, 2023 USD ($) investment
Cash and Cash Equivalents [Abstract] |  |  |  |  |
Reclassify from accumulated other comprehensive income (loss) | $ 0 | $ 0 | $ 0 | $ 0 |
Contractual maturity in one year | 120,400,000 |  | 120,400,000 |  | $ 122,000,000
Contractual maturity greater than one year | $ 4,000,000 |  | $ 4,000,000 |  | $ 5,900,000
Number of short-term investments in unrealized loss position, investments | investment | 30 |  | 30 |  | 27

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