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Marketable Securities - Additional Information (Details) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2026 USD ($) Security | Apr. 30, 2025 USD ($) | Apr. 30, 2026 USD ($) Security | Apr. 30, 2025 USD ($) | Oct. 31, 2025 USD ($) Security
Marketable Securities [Line Items] |  |  |  |  |
Number of securities held | Security | 60 |  | 60 |  | 50
Number of unrealized loss position | Security | 42 |  | 42 |  | 14
Number of unrealized loss position for greater than 12 months | Security | 1 |  | 1 |  |
Accrued interest receivable | $ 2,100,000 |  | $ 2,100,000 |  | $ 1,300,000
Aggregate fair value | $ 182,900,000 |  | $ 182,900,000 |  | $ 55,900,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Prepaid Expense and Other Assets, Current |  | Prepaid Expense and Other Assets, Current |  | Prepaid Expense and Other Assets, Current
Accrued interest receivable written off | $ 0 | $ 0 | $ 0 | $ 0 |
Realized gains or losses on sale or maturity of available-for-sale securities | $ 0 | $ 0 | $ 0 | $ 0 |
Maximum [Member] |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Percentage of unrealized loss on security |  |  | 1.00% |  |
US Treasury and Government [Member] | Minimum [Member] |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Debt securities unrealized losses |  |  | 0.00% |  | 0.00%
US Treasury and Government [Member] | Maximum [Member] |  |  |  |  |
Marketable Securities [Line Items] |  |  |  |  |
Debt securities unrealized losses |  |  | 1.00% |  | 1.00%

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