Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Income Tax Disclosure [Abstract]
Federal statutory tax expense	$ 16,436	$ 11,420	$ 29,970
State taxes, net of federal tax effect	3,687	2,387	5,159
Credit for research activities	(3,965)	(3,891)	(4,050)
Valuation allowance	(221)	1,264	98
Goodwill impairment	137	1,453	0
Executive compensation limitation	1,179	529	139
Other – net	1,203	(696)	895
Total income tax expense	$ 18,456	$ 12,466	$ 32,211