Employee Benefit Plans - Additional Information (Detail)	12 Months Ended
Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Employee's contribution to 401(k) plan	50.00%
Employer's contribution to 401(k) plan	0.00%	0.00%	0.00%

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration