Accounts Receivable and Allowance for Doubtful Accounts - Schedule of Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 2,100	$ 600	$ 1,100	$ 400
Provision (recoveries)	1,300	300	2,500	500
Write-offs	(600)	0	(800)	0
Ending balance	$ 2,800	$ 900	$ 2,800	$ 900