CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2024
Statement of Comprehensive Income [Abstract]
Net loss	$ (450,735)	$ (288,441)	$ (338,693)
Other comprehensive income (loss):
Changes in unrealized gains on investments	156	3,708	4,817
Total comprehensive loss	$ (450,579)	$ (284,733)	$ (333,876)