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Cash, Cash Equivalents, and Investments - Components of Cash and Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2024 | Jan. 31, 2024 | Apr. 30, 2023
--- | --- | --- | ---
Cash and cash equivalents |  |  |
Cash | $ 50,282 | $ 55,736 |
Money market funds | 325,781 | 305,283 |
Commercial paper | 5,480 | 994 |
U.S. Treasury securities | 998 | 998 |
Total cash and cash equivalents | 382,541 | 363,011 | $ 300,605
Debt Securities, Available-for-sale [Line Items] |  |  |
Total available-for-sale investments | 210,242 | 208,178 |
U.S. Treasury securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Total available-for-sale investments | 56,683 | 50,036 |
Commercial paper |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Total available-for-sale investments | 17,102 | 2,886 |
Corporate debt securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Total available-for-sale investments | 108,484 | 131,259 |
U.S. Government agency securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Total available-for-sale investments | $ 27,973 | $ 23,997 |

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