CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (77,294)	$ (63,992)
Other comprehensive loss, net of tax:
Unrealized (loss) gain on available-for-sale securities	(2,364)	34
Foreign currency translation adjustment	613	(90)
Other comprehensive loss	(1,751)	(56)
Total comprehensive loss	$ (79,045)	$ (64,048)