Revenue Recognition - Schedule of net revenue from collaborative arrangements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue Recognition and Collaboration Arrangements
Total net royalty revenue	$ 76,372	$ 90,059
Royalty revenue
Revenue Recognition and Collaboration Arrangements
Total net royalty revenue	56,858	90,059
GSK
Revenue Recognition and Collaboration Arrangements
Total net royalty revenue	56,858	90,059
GSK | Royalty revenue
Revenue Recognition and Collaboration Arrangements
Royalties	60,314	93,515
Less: amortization of capitalized fees paid to a related party	(3,456)	(3,456)
GSK | RELVAR/BREO
Revenue Recognition and Collaboration Arrangements
Royalties	50,883	55,764
GSK | ANORO
Revenue Recognition and Collaboration Arrangements
Royalties	9,431	8,442
GSK | TRELEGY
Revenue Recognition and Collaboration Arrangements
Royalties	$ 0	$ 29,309