Accounts Receivable, Net - Reconciliation of Beginning and Ending Amount of Allowance for Contract Losses and Doubtful Accounts (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019
Receivables [Abstract]
Balance at January 3, 2020	$ 4,295
Provision for contract losses and doubtful accounts	2,817	$ 1,786
Write-offs	(957)
Balance at July 3, 2020	$ 6,155