Revenue - Revenue from Collaborative Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Collaborative Arrangements and Co-Promote Agreement
Revenue	$ 19,862	$ 5,338
Collaboration revenue recognized in the period from:
Revenue from collaborative arrangements	6,632	5,333
Janssen
Collaboration revenue recognized in the period from:
Revenue from collaborative arrangements	6,622	5,323
Other
Collaboration revenue recognized in the period from:
Revenue from collaborative arrangements	10	15
Collaborative revenue
Collaborative Arrangements and Co-Promote Agreement
Revenue	6,632	5,338
Collaboration revenue recognized in the period from:
Revenue from collaborative arrangements	$ 6,632	$ 5,338