Leases - Supplemental Cash Flow Information Related to Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Leases [Abstract]
Operating lease cost	$ 752	$ 726	$ 2,238	$ 2,020
Cash paid for amounts included in the measurement of operating lease liabilities:
Operating cash flows	780	739	2,281	2,031
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,842	$ 140	$ 3,160	$ 2,797