Fair Value Measurements - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Fair Value Disclosures [Abstract]
Impairments	$ (7,158)	$ (2,101)	$ (25,911)	$ (2,101)
Net unrealized gains (losses) on marketable equity securities	650	7,410	(3,005)	4,996
Net unrealized gains (losses) on strategic investments in equity securities	(6,508)	5,309	(28,916)	2,895
Net realized gains on marketable equity securities sold	0	0	1,713	0
Total—included in other income (expense), net	$ (6,508)	$ 5,309	$ (27,203)	$ 2,895