Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (120,378)	$ (100,026)	$ (242,939)	$ (339,689)
Other comprehensive income (loss), net of tax:
Unrealized gain (loss) on available-for-sale marketable securities, net	159	36	(301)	9
Foreign currency translation adjustments	550	3,660	552	7,914
Other comprehensive income (loss), net	709	3,696	251	7,923
Comprehensive loss	$ (119,669)	$ (96,330)	$ (242,688)	$ (331,766)