Supplemental Information - Schedule of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 132,660	$ 92,062	$ 350,413	$ 252,084	$ 351,318
Zai License and Collaboration Agreement
Revenues from External Customers and Long-Lived Assets [Line Items]
Regulatory and commercial milestone payable	2		2
Zai License and Collaboration Agreement | License | Accounting Standards Update 2014-09
Revenues from External Customers and Long-Lived Assets [Line Items]
Liability, revenue recognized			8
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	92,635	61,399	243,103	166,937	232,805
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	22,756	21,688	66,027	64,065	86,564
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	5,468	2,794	12,069	5,442	8,782
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	7,523	4,779	21,153	12,334	17,912
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 4,278	$ 1,402	$ 8,061	$ 3,306	$ 5,255