Income Taxes - Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits, Excluding Interest and Penalties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Income Tax Disclosure [Abstract]
Beginning balance	$ 2,339	$ 2,127	$ 4,487
Increases for tax positions in current year	10	208	72
Increases for tax positions in prior years	0	4	27
Decreases for tax positions in prior years	0	0	(2,459)
Ending balance	$ 2,349	$ 2,339	$ 2,127