Income Taxes Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Document Fiscal Year Focus	2017
Deferred Tax Assets [Abstract]
Stock-based compensation	$ 6,940	$ 9,834
Deferred rent and lease incentives	6,007	8,388
Warranty and returns liabilities	6,602	7,948
Net operating loss carryforwards and credits	3,240	6,368
Compensation and benefits	3,315	4,115
Other	3,321	5,264
Total gross deferred tax assets	29,425	41,917
Valuation allowance	(615)	(620)
Total deferred tax assets after valuation allowance	28,810	41,297
Deferred Tax Liabilities [Abstract]
Property and equipment	21,475	27,049
Deferred revenue	723	3,279
Other	3,987	6,302
Total gross deferred tax liabilities	26,185	36,630
Net deferred tax assets	2,625	$ 4,667
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	3,000
State [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 6,000