Fair Value Measurements - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Oct. 31, 2023
Fair Value Disclosures [Abstract]
Impairments	$ (5,200)	$ (1,000)	$ (11,578)	$ (3,101)
Net unrealized gains (losses) on marketable equity securities	(3,791)	(790)	(6,796)	4,206
Net unrealized gains (losses) on strategic investments in equity securities	(8,991)	(1,790)	(18,374)	1,105
Net realized gains (losses) on equity securities sold	380	0	(17,440)	0
Total—included in other income (expense), net	$ (8,611)	$ (1,790)	$ (35,814)	$ 1,105