Summary of Significant Accounting Policies - Marketing And Advertising (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 29, 2017	Apr. 30, 2016
Marketing and Advertising
Marketing, advertising and promotional costs	$ 815	$ 281
Marketing expenses	$ 152	$ 157

Expenditures for planning and executing the conception, pricing, promotion, and distribution of ideas, goods, and services. Costs of public relations and corporate promotions are typically considered to be marketing costs.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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