Summary of Significant Accounting Policies - Revenue Recognition and Cost of Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Revenue Recognition
Maximum period allowed to customers to return merchandise after the date of sale	30 days
Period after the year end for entity to reduce revenue for each fiscal year using a combination of actual and estimated return information for the returns	30 days
Provision for sales return	$ 100	$ 100
Period within which if merchandise is not fully paid for, the customer is given a store credit for merchandise payments made	60 days
Amount amortized into income for gift cards not expected to be redeemed	$ 0	0
Immateriality of the gift card liability	800	600
Cost of Sales
Distribution center costs	$ 17,200	$ 15,700	$ 14,200