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Cash, Cash Equivalents, and Investments - Additional Information (Details) $ in Millions | Apr. 30, 2024 USD ($) security | Jan. 31, 2024 USD ($) security
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Available-for-sale securities in an unrealized loss position | security | 109 | 70
Securities in unrealized loss position | $ | $ 204.8 | $ 108.7
Securities in a continuous net loss position for 12 months or longer | security | 30 | 33
Securities in continuous unrealized loss position for more than 12 months | $ | $ 0.1 | $ 0.2

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