Business and Operations - Revision of Previously Issued Financial Statements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill	$ 10,111		$ 10,111		$ 10,099	$ 136,048	$ 100,428
Intangible assets, net	14,135		14,135		15,500	48,040	39,264
Accumulated other comprehensive loss	(9,748)		(9,748)		(10,017)	(9,866)	(6,716)
Accumulated deficit	(562,780)		(562,780)		(539,493)	(332,980)	(317,146)
Depreciation and amortization	2,753	$ 3,064	5,398	$ 5,743
Operating loss	(9,897)	(14,043)	(18,893)	(28,428)
Net loss	(13,863)	(14,790)	(23,287)	(30,624)	(222,300)
Foreign currency translation gain (loss)	269	1,831	269	(1,319)
Comprehensive loss	$ (13,594)	(12,959)	$ (23,018)	(31,943)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill						139,195	101,375
Intangible assets, net						49,240	39,658
Accumulated other comprehensive loss					(5,608)	(5,486)	(5,389)
Accumulated deficit					(543,902)	(333,013)	(317,132)
Depreciation and amortization		3,105		5,831
Operating loss		(14,084)		(28,516)
Net loss		(14,831)		(30,712)
Foreign currency translation gain (loss)		(21)		(118)
Comprehensive loss		(14,852)		(30,830)
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill						(3,147)	(947)
Intangible assets, net						(1,200)	(394)
Accumulated other comprehensive loss					(4,409)	(4,380)	(1,327)
Accumulated deficit					$ 4,409	$ 33	$ (14)
Depreciation and amortization		(41)		(88)
Operating loss		41		88
Net loss		41		88
Foreign currency translation gain (loss)		1,852		(1,201)
Comprehensive loss		$ 1,893		$ (1,113)