Significant Accounting Policies - Summary of Distribution Center Lease Loss Liability Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2019	Feb. 03, 2018
Balance at beginning of fiscal year	$ 7,100	$ 3,188
Lease loss liability remeasurements	(3,411)	(4,417)
Payments made under lease agreements	(2,249)	(1,699)
Payments received under sublease agreements	1,138	1,003
Interest	415	191
Balance at end of fiscal year	9,815	7,100
Distribution Center Closures [Member]
Balance at beginning of fiscal year	2,585
Lease loss liability additions	1,927	2,447
Lease loss liability remeasurements	(1,232)
Payments made under lease agreements	(6,041)	(583)
Payments received under sublease agreements	4,904	716
Interest	34	5
Balance at end of fiscal year	$ 2,177	$ 2,585