Basis of Presentation and Significant Accounting Policies - Schedule of Reconciliation of Cash And Cash Equivalents And Restricted Cash (Details) - USD ($) $ in Thousands		Jun. 28, 2019	Dec. 28, 2018	Jun. 29, 2018	Dec. 29, 2017
Accounting Policies [Abstract]
Cash and cash equivalents		$ 103,251	$ 103,877	$ 21,246
Restricted cash	[1]		122	121
Total cash, cash equivalents and restricted cash		$ 103,251	$ 103,999	$ 21,367	$ 18,641

[1] Included in other assets on the Condensed Consolidated Balance Sheets.