Revenue Receivables and Contract Assets and Liabilities - Summary of Company's Revenue Disaggregated by Contract Types (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 03, 2025	Dec. 29, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 480,236	$ 632,806
Fixed-Price [Member]
Disaggregation of Revenue [Line Items]
Total revenue	442,243	567,224
Cost Reimbursable [Member]
Disaggregation of Revenue [Line Items]
Total revenue	36,070	57,063
Equipment and Labor Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,923	$ 8,519