Segment Information - Reconciliation of Segment Measure to Loss Before Benefit from Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
Total	$ 16,706	$ 8,219	$ 36,157	$ 21,836
Interest expense, net	(3,043)	(2,130)	(10,896)	(4,590)
Income tax (expense) benefit	(3,348)	412	1,563	1,308
Depreciation and amortization	(9,740)	(7,412)	(27,084)	(20,262)
Stock-based compensation	(1,149)	(1,055)	(3,439)	(3,577)
Start-up losses and investment in new services	(602)	(634)	(1,283)	(1,091)
Acquisition costs	(6)	(1,278)	(3,767)	(2,350)
Fair value changes in contingent put option	26,265		19,240
Fair value changes in warrant options	(9,311)	(2,510)	(9,312)	(4,059)
Fair value changes in compound embedded option	(26,664)		(27,420)
Fair value changes in business acquisitions contingent consideration	(13,404)	(256)	(17,387)	670
Short term purchase accounting fair value adjustment to deferred revenue			(243)
IPO preparation costs and IPO related bonuses	(6,378)	(20)	(6,908)	(105)
Discontinued services	(30)		(7,526)
Expenses related to financing transactions			(277)
Other expenses	(33)	(19)	(179)	(27)
Net loss	$ (30,737)	$ (6,683)	$ (58,761)	$ (12,247)