Cash and Cash Equivalents, Investments and Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Apr. 30, 2024 |
Apr. 30, 2024 |
Jan. 31, 2024 |
|
| Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items] | |||
| Investments, weighted average maturity | 18 months | ||
| Investments, term | 2 years | ||
| Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | $ 1,400 | $ 1,400 | |
| Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer | 333,400 | 333,400 | |
| Debt and equity securities | 319,181 | 319,181 | $ 188,069 |
| Level 3 | Strategic Investments | |||
| Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items] | |||
| Debt and equity securities | $ 18,400 | $ 18,400 | $ 16,100 |