Fair Value Measurements - Schedule of Change in Fair Value of Contingent Consideration Liability Using Unobservable Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Change in fair value of contingent consideration liability	$ (94)		$ (113)
Significant Unobservable Inputs (Level 3) [Member]
Balance as of December 31, 2018			499
Payments against contingent consideration			(78)
Change in fair value of contingent consideration liability			(113)
Accretion of contingent consideration liability			41
Balance as of June 30, 2019	$ 349		$ 349