Commitments and Contingencies - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 3,112	$ 3,024
Short-term lease cost	78	82
Total lease cost	$ 3,190	$ 3,106