Revenue - Schedule of Accounts Receivable and Deferred Revenues (Detail) $ in Thousands	6 Months Ended
	Jun. 27, 2020 USD ($)
Deferred Revenue - Short Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	$ 60,613
Net (decrease) increase during the period	(9,667)
Deferred Revenue, Ending balance	50,946
Deferred Revenue - Long Term
Contract With Customer Asset And Liability [Line Items]
Deferred Revenue, Beginning balance	54
Net (decrease) increase during the period	20
Deferred Revenue, Ending balance	$ 74