Accounts Receivable, Net - Additional Information (Detail) - USD ($)	9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019
Accounts Notes And Loans Receivable [Line Items]
Provision for contract losses and doubtful accounts	$ 2,890,000	$ 2,146,000
Economic Uncertainty of COVID-19 Pandemic [Member]
Accounts Notes And Loans Receivable [Line Items]
Provision for contract losses and doubtful accounts	$ 1,269,000