Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Oct. 01, 2021	Jan. 01, 2021
Accounts Notes And Loans Receivable [Line Items]
Allowance for contract losses and doubtful accounts	$ (4,815)	$ (3,995)
Total accounts receivable, net	144,039	111,565
Billed accounts receivable
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable	102,812	80,298
Unbilled accounts receivable
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable	$ 46,042	$ 35,262