Credit Facilities - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 30, 2016
Line Of Credit Facility [Line Items]
Less unamortized debt issuance costs	$ (1,622)	$ (1,886)
Total long-term debt	38,208	37,944
Total long-term debt, net of current portion	38,208	37,944
Term Loan Facility
Line Of Credit Facility [Line Items]
Term loan facility	$ 39,830	$ 39,830