Summary of Significant Accounting Policies - Revenue by Contract Type (Details)	3 Months Ended		6 Months Ended
	Jul. 01, 2022	Jul. 02, 2021	Jul. 01, 2022	Jul. 02, 2021
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	100.00%	100.00%	100.00%	100.00%
Time-and-material [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	77.70%	79.20%	77.60%	79.30%
Progress Billing [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	17.70%	18.70%	18.10%	18.40%
Percentage-of-completion [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	4.60%	2.10%	4.30%	2.30%