CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 96,853	$ (32,620)	$ (162,815)	$ (546,654)
Other comprehensive income (loss):
Net unrealized gain (loss) on investments (net of tax)	598	(3,486)	5,245	(10,027)
Total other comprehensive income (loss)	598	(3,486)	5,245	(10,027)
Comprehensive income (loss)	$ 97,451	$ (36,106)	$ (157,570)	$ (556,681)