Summary of Significant Accounting Policies - Revenue by Contract Type (Details)	3 Months Ended
	Apr. 01, 2022	Apr. 02, 2021
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	100.00%	100.00%
Time-and-material [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	77.20%	79.10%
Progress Billing [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	18.90%	18.40%
Percentage-of-completion [Member]
Schedule Of Revenue By Contract Type [Line Items]
Revenue percent	3.90%	2.50%