Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (132,241)	$ (197,024)	$ (134,327)
Other comprehensive income (loss):
Foreign currency translation adjustment	(8,374)	141	131
Available-for-sale short-term investments:
Unrealized gain, net of tax	0	0	23
Reclassification to net income, net of tax	0	(23)	0
Other comprehensive income (loss)	(8,374)	118	154
Comprehensive loss	$ (140,615)	$ (196,906)	$ (134,173)