Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019		Jan. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (200,987)	$ (178,362)		$ (159,878)	[1]
Other comprehensive income (loss) net of tax:
Change in unrealized net gain (loss) on available-for-sale securities	5,787	1,579	[2]	(1,355)	[2]
Comprehensive loss	$ (195,200)	$ (176,783)	[2]	$ (161,233)	[2]

[1]

[2]