Revenue

12 Months Ended

Dec. 31, 2019

Revenue From Contract With Customer [Abstract]

Revenue

11. Revenue

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

	Year Ended December 31,
	2019		2018
Point-in-time	$	286,130	$	257,124
Over-time		19,766		16,660
Total revenue	$	305,896	$	273,784

See Note 16 of the Notes to the Consolidated Financial Statements for additional discussion of the Company’s disaggregated revenue in detail.

Contract Liabilities

The Company records contract liabilities when the customer has been billed in advance of the Company completing its performance obligations. These amounts are recorded as deferred revenue in the Consolidated Balance Sheets.

Changes in deferred revenue were as follows:

	Year Ended December 31,
	2019			2018
Balance, beginning of the period	$	8,080		$	7,206
Deferred revenue assumed in Merger		5,931			—
Deferral of revenue		28,651			19,326
Recognition of deferred revenue		(27,569	)		(18,452	)
Balance, ending of the period	$	15,093		$	8,080