Retirement Savings Plan - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Age of employees covered by plan	21 years
Service period required (in months)	3 months
Total employer contribution	$ 0.8	$ 0.7	$ 0.7

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration