401(k) Plan (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021	Dec. 27, 2019
Compensation And Retirement Disclosure [Abstract]
Percentage of pre-tax annual compensation contributed to the plan	15.00%
Percentage of matching contributions of employee	40.00%
Percentage of matching contributions of employee's gross salary	6.00%
Company's matching contributions	$ 0.8	$ 0.8	$ 0.8