CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (60,291)	$ (78,364)	$ (340,503)	$ (217,653)
Other comprehensive income:
Change in unrealized gains on investments	1,362	1,442	537	4,137
Total comprehensive loss	$ (58,929)	$ (76,922)	$ (339,966)	$ (213,516)