Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock Common Stock, Class A	Common Stock Common Stock, Class B	Additional Paid in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss) Income
Beginning balance (in shares) at Jan. 30, 2015		0	70,000
Beginning balance at Jan. 30, 2015	$ 606,926	$ 0	$ 700	$ 656,516	$ (50,265)	$ (25)
Statement of Shareholders' Equity
Net loss	(72,381)				(72,381)
Other comprehensive (loss) income	(1,496)					(1,496)
Capital contribution from parent, net	54,566			54,566
Stock-based compensation	841			841
Ending balance (in shares) at Jan. 29, 2016		0	70,000
Ending balance at Jan. 29, 2016	588,456	$ 0	$ 700	711,923	(122,646)	(1,521)
Statement of Shareholders' Equity
Net loss	(38,213)				(38,213)
Other comprehensive (loss) income	(1,910)					(1,910)
Issuance of common stock in connection with initial public offering, net of offering costs (in shares)		8,000
Issuance of common stock in connection with initial public offering, net of offering costs	96,326	$ 80		96,246
Conversion of convertible notes to common stock in connection with initial public offering (in shares)		2,009
Conversion of convertible notes to common stock in connection with initial public offering	28,125	$ 20		28,105
Grant of restricted stock awards (in shares)		557
Grant of restricted stock awards	(11)	$ 7		(18)
Capital contribution from parent, net	9,547			9,547
Stock-based compensation	8,883			8,883
Excess tax benefit from share-based payment	221			221
Ending balance (in shares) at Feb. 03, 2017		10,566	70,000
Ending balance at Feb. 03, 2017	691,424	$ 107	$ 700	854,907	(160,859)	(3,431)
Statement of Shareholders' Equity
Net loss	(28,077)				(28,077)
Other comprehensive (loss) income	3,294					3,294
Vesting of restricted stock units (in shares)		384
Vesting of restricted stock units	0	$ 4		(4)
Grant of restricted stock awards (in shares)		284
Grant of restricted stock awards	0	$ 2		(2)
Common stock withheld as payment for withholding taxes upon the vesting of restricted shares (in shares)		(149)
Common stock withheld as payment for withholding taxes upon the vesting of restricted shares	(1,282)	$ (2)		(1,280)
Stock-based compensation	13,790			13,790
Ending balance (in shares) at Feb. 02, 2018		11,085	70,000
Ending balance at Feb. 02, 2018	$ 679,149	$ 111	$ 700	$ 867,411	$ (188,936)	$ (137)