Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 27, 2017	Jan. 29, 2016	Jan. 30, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 626	$ 688
Provision	281	286	$ 371
Write-offs	(328)	(348)	(714)
Ending balance	$ 579	$ 626	$ 688