Income Taxes - Unrecognized Tax Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Tax Disclosure [Abstract]
Balance, beginning of period	$ 548	$ 437	$ 770
Additions based on tax positions related to the current year	124	45	49
Additions for tax positions of prior years	338	66	525
Lapse of statute of limitations	(123)		0
Reductions for positions of prior years	0	0	(68)
Settlement	0	0	(839)
Balance, end of period	$ 887	$ 548	$ 437