CONSOLIDATED STATEMENTS OF CHANGES IN CONVERTIBLE REDEEMABLE PREFERRED STOCK AND STOCKHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Series 1 Preferred Stock	Additional Paid-in Capital	Accumulated Deficit	Convertible Redeemable Preferred Stock
Beginning balance (in shares) at Jan. 31, 2017						628
Beginning balance at Jan. 31, 2017						$ 689,329
Increase (Decrease) in Temporary Equity [Roll Forward]
Accretion of convertible redeemable preferred units and preferred stock	$ 361,520					$ 361,520
Issuance of Series F convertible redeemable preferred stock, net of issuance costs (in shares)						67
Issuance of Series F convertible redeemable preferred stock, net of issuance costs						$ 124,981
Effect of equity reorganization (in shares)						(695)
Effect of equity reorganization						$ (1,175,830)
Ending balance (in shares) at Jan. 28, 2018						0
Ending balance at Jan. 28, 2018						$ 0
Beginning balance (in shares) at Jan. 31, 2017		600	60
Beginning balance at Jan. 31, 2017	(634,024)	$ 6	$ 1	$ 0	$ (634,031)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accretion of convertible redeemable preferred stock	(361,520)			(9,396)	(352,124)
Share-based compensation expense	11,209			11,209
Effect of equity reorganization (in shares)		(600)	(60)
Effect of equity reorganization	1,175,830	$ (6)	$ (1)	1,175,837
Contribution from Parent	62,859			62,859
Net loss	(338,057)				(338,057)
Ending balance (in shares) at Jan. 28, 2018		0	0
Ending balance at Jan. 28, 2018	(83,703)	$ 0	$ 0	1,240,509	(1,324,212)
Ending balance (in shares) at Feb. 03, 2019						0
Ending balance at Feb. 03, 2019						$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	14,351			14,351
Contribution from Parent	1,300			1,300
Net loss	(267,890)				(267,890)
Ending balance (in shares) at Feb. 03, 2019		0	0
Ending balance at Feb. 03, 2019	(335,942)	$ 0	$ 0	1,256,160	(1,592,102)
Ending balance (in shares) at Feb. 02, 2020						0
Ending balance at Feb. 02, 2020						$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of Class A common stock upon initial public offering, net of underwriting discounts, commissions and offering costs (in shares)		5,600
Issuance of Class A common stock upon initial public offering, net of underwriting discounts, commissions and offering costs	110,349	$ 56		110,293
Change in capital structure (in shares)		393,000
Change in capital structure	0	$ 3,930		(3,930)
Distribution to Parent (in shares)		83
Distribution to Parent	0	$ 1		(1)
Share-based compensation expense	134,926			134,926
Vesting of share-based compensation awards (in shares)		2,685
Vesting of share-based compensation awards	(224)	$ 27		(251)
Contribution from Parent	1,300			1,300
Tax sharing agreement with Parent	17,497			17,497
Termination of loan from Parent	(79,510)			(79,510)
Net loss	(252,370)				(252,370)
Ending balance (in shares) at Feb. 02, 2020		401,368	0
Ending balance at Feb. 02, 2020	$ (403,974)	$ 4,014	$ 0	$ 1,436,484	$ (1,844,472)