Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Apr. 29, 2017	Apr. 30, 2016	Jan. 28, 2017
Income Tax [Line Items]
Income tax benefit	$ 1,913,000	$ 8,533,000
Effective income tax rate	36.20%	38.80%
Unrecognized tax benefits	$ 1,400,000		$ 1,400,000
Exposures related to unrecognized tax benefits	$ 0
Period of unrecognized tax benefits change	12 months
Accounting Standard Update 2016-09 [Member]
Income Tax [Line Items]
Discrete tax expense related to net excess tax shortfalls from stock-based payments	$ 100,000