Condensed Consolidated Statements of Stockholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Restricted Stock Units Common Stock	Restricted Stock Common Stock
Beginning balance (in shares) at Jan. 31, 2019		243,524
Beginning balance at Jan. 31, 2019	$ 737,780	$ 24	$ 1,820,043	$ (338)	$ (1,081,949)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		3,208
Issuance of common stock upon exercise of stock options	16,789	$ 1	16,788
Additional Paid-in Capital	61,746		61,746
Vesting of restricted stock units (in shares)						2,050
Net issuance of restricted stock (in shares)		1,098
Restricted stock settlement, taxes paid	(5,672)		(5,672)
Common stock issued under employee stock purchase plan (in shares)		2,973
Common stock issued under employee stock purchase plan	32,042		32,042
Other comprehensive income (loss)	1,627			1,627
Net loss	(100,336)				(100,336)
Ending balance (in shares) at Apr. 30, 2019		252,853
Ending balance at Apr. 30, 2019	743,976	$ 25	1,924,947	1,289	(1,182,285)
Beginning balance (in shares) at Feb. 02, 2020		264,008
Beginning balance at Feb. 02, 2020	830,118	$ 26	2,107,579	5,449	(1,282,936)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		2,175
Issuance of common stock upon exercise of stock options	9,388		9,388
Additional Paid-in Capital	58,694		58,694
Vesting of restricted stock units (in shares)						2,525
Cancellation of restricted stock (in shares)							(230)
Tax withholding on vesting of restricted stock (in shares)		(134)
Restricted stock settlement, taxes paid	(1,374)		(1,374)
Common stock issued under employee stock purchase plan (in shares)		1,585
Common stock issued under employee stock purchase plan	16,021		16,021
Repurchase of common stock (in shares)		(5,959)
Repurchase of common stock	(70,119)		(70,119)
Other comprehensive income (loss)	4,724			4,724
Net loss	(90,594)				(90,594)
Ending balance (in shares) at May. 03, 2020		263,970
Ending balance at May. 03, 2020	$ 756,858	$ 26	$ 2,120,189	$ 10,173	$ (1,373,530)