Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2024	Jul. 31, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (69,184)	$ (89,538)	$ (139,289)	$ (196,407)
Other comprehensive income (loss):
Change in unrealized gains (losses) on investments	3,938	(3,358)	2,695	(2,604)
Total comprehensive loss	$ (65,246)	$ (92,896)	$ (136,594)	$ (199,011)