Supplemental Information - Schedule of Revenues by Geographic Region (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
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 115,925	$ 86,713	$ 217,753	$ 160,022	$ 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	81,209	58,934	150,468	105,538	232,805
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	21,469	21,097	43,271	42,377	86,564
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	3,927	1,408	6,601	2,648	8,782
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	7,179	4,185	13,630	7,555	17,912
Greater China
Revenues from External Customers and Long-Lived Assets [Line Items]
Net revenues	$ 2,141	$ 1,089	$ 3,783	$ 1,904	$ 5,255