CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (72,019)	$ (69,184)	$ (280,212)	$ (139,289)
Other comprehensive income (loss):
Change in unrealized gains (losses) on investments	(2,720)	3,938	(825)	2,695
Total comprehensive loss	$ (74,739)	$ (65,246)	$ (281,037)	$ (136,594)