Accounts Receivable, Net (Detail) - USD ($) $ in Thousands	Oct. 02, 2020	Jan. 03, 2020
Accounts Notes And Loans Receivable [Line Items]
Allowance for contract losses and doubtful accounts	$ (5,834)	$ (4,295)
Total accounts receivable, net	109,964	120,138
Billed accounts receivable
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable	75,520	85,579
Unbilled accounts receivable
Accounts Notes And Loans Receivable [Line Items]
Accounts Receivable	$ 40,278	$ 38,854