Revenue Recognition and Collaborative Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 85,518	$ 78,678
GSK
Revenue Recognition and Collaborative Arrangements
Total net revenue	85,518	78,678
GSK | Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	88,974	82,134
Less: amortization of capitalized fees paid to a related party	(3,456)	(3,456)
GSK | RELVAR/BREO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	56,390	56,149
GSK | ANORO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	10,500	9,850
GSK | TRELEGY
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	$ 22,084	$ 16,135