Revenue (Tables)

9 Months Ended

Sep. 26, 2020

Revenue From Contract With Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table represents a disaggregation of revenue by timing of revenue:

	Three Months Ended				Nine Months Ended
	September 26,		September 30,		September 26,		September 30,
	2020		2019		2020		2019
Point-in-time	$	122,015	$	58,663	$	387,556	$	172,562
Over-time		4,477		4,272		13,812		12,776
Total revenue	$	126,492	$	62,935	$	401,368	$	185,338

Schedule of Changes in Deferred Revenue

Changes in deferred revenue were as follows:

	Three Months Ended						Nine Months Ended
	September 26,			September 30,			September 26,			September 30,
	2020			2019			2020			2019
Balance, beginning of the period	$	17,894		$	9,349		$	15,093		$	8,080
Deferral of revenue		10,137			5,860			33,389			17,492
Recognition of deferred revenue		(10,396	)		(7,937	)		(30,847	)		(18,300	)
Balance, end of the period	$	17,635		$	7,272		$	17,635		$	7,272