Accounts Receivable, Net - Reconciliation of Beginning and Ending Amount of Allowance for Contract Losses and Doubtful Accounts (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020
Receivables [Abstract]
Balance at January 1, 2021	$ 3,995
Provision for contract losses and doubtful accounts	1,197	$ 2,890
Write-offs	(377)
Balance at October 1, 2021	$ 4,815