CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2026	Apr. 30, 2025
Statement of Comprehensive Income [Abstract]
Net loss	$ (76,164)	$ (208,193)
Other comprehensive income (loss):
Change in unrealized gains (losses) on investments	(1,263)	1,895
Total comprehensive loss	$ (77,427)	$ (206,298)