Financial Instruments - Maturity of Investments (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Jan. 31, 2025
Fair Value Disclosures [Abstract]
Due within one year	$ 406,336
Due between one to two years	71,723
Total	$ 478,059	$ 518,813

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details