Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019	Oct. 31, 2020	Nov. 02, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (55,868)	$ (8,123)	$ (281,003)	$ (8,407)
Other comprehensive loss:
Unrealized (losses) gains on marketable securities, net of taxes	(32)	14	(61)	208
Foreign currency translation adjustment	0	(286)	580	(265)
Comprehensive loss	$ (55,900)	$ (8,395)	$ (280,484)	$ (8,464)