Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2019	Jan. 02, 2018	Jan. 03, 2017	Jul. 03, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected unredeemed percent	8.00%
Estimated redemption period	18 months
Gift card liability	$ 3,284	$ 4,078		$ 300
Revenue recognized	5,900	5,500	$ 5,400
Gift card breakage	1,000	300	$ 300
Gift card breakage resulting from unredeemed balances	300
Retained earnings	(111,135)	(101,188)
Accrued Expenses and Other Current Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability	3,300	4,100
Other Long-term Liabilities
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Gift card liability, non-current	400	400
Calculated under Revenue Guidance in Effect on Adoption of Topic 606 | Accounting Standards Update 2014-09
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue recognized	$ 100
Retained earnings		$ 1,500