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Fair Value Measurements (Details) - USD ($) $ in Thousands | Apr. 30, 2026 | Jan. 31, 2026 | Oct. 31, 2023
--- | --- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market funds | $ 151,649 | $ 186,396 |
Included in investments | 235,077 | 232,436 |
Total | $ 386,726 | 418,832 |
Convertible Senior Notes | 2028 Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Stated interest rate | 1.50% |  | 1.50%
Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total | $ 150,653 | 185,205 |
Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total | 236,073 | 233,627 |
Level 2 | 2028 Notes |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value of convertible senior notes | 367,100 |  |
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Total | 0 | 0 |
U.S. Treasury securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 61,440 | 60,429 |
U.S. Treasury securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
U.S. Treasury securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 61,440 | 60,429 |
U.S. Treasury securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
Commercial paper |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 6,178 | 3,409 |
Commercial paper | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
Commercial paper | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 6,178 | 3,409 |
Commercial paper | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
Corporate debt securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 141,566 | 143,490 |
Corporate debt securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
Corporate debt securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 141,566 | 143,490 |
Corporate debt securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
U.S. Government agency securities |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 26,889 | 26,299 |
U.S. Government agency securities | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
U.S. Government agency securities | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 26,889 | 26,299 |
U.S. Government agency securities | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Included in investments | 0 | 0 |
Money market funds |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market funds | 150,653 | 185,205 |
Money market funds | Level 1 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market funds | 150,653 | 185,205 |
Money market funds | Level 2 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market funds | 0 | 0 |
Money market funds | Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Money market funds | $ 0 | $ 0 |

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