CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss		$ (13,861)	$ (5,284)	$ (37,134)	$ (38,490)
Other comprehensive (loss) income
Changes in foreign currency translation adjustment	[1]	(1,754)	(37)	(2,730)	135
Changes in unrealized loss on cash flow hedge	[1]	452	115	754	(1,125)
Other comprehensive (loss) income		(1,302)	78	(1,976)	(990)
Comprehensive loss		$ (15,163)	$ (5,206)	$ (39,110)	$ (39,480)

[1] Tax effect was not material