Revenue Recognition and Collaborative Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 88,694	$ 65,755	$ 246,318	$ 185,045
Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	88,694	65,755	236,318	185,045
Revenue from collaborative arrangements with a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	0	0	10,000	0
GSK
Revenue Recognition and Collaborative Arrangements
Total net revenue	88,694	65,755	246,318	185,045
GSK \| Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	92,150	69,211	246,686	195,413
Less: amortization of capitalized fees paid to a related party	(3,456)	(3,456)	(10,368)	(10,368)
Total net revenue	88,694	65,755	236,318	185,045
GSK \| RELVAR/BREO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	63,893	46,433	165,612	136,259
GSK \| ANORO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	11,882	11,548	32,931	30,753
GSK \| TRELEGY
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	16,375	11,230	48,143	28,401
GSK \| Revenue from collaborative arrangements with a related party \| Strategic alliance - MABA program
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 0	$ 0	$ 10,000	$ 0

Gross Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer before amortization of capitalized fees.

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Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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