Revenue Recognition and Collaborative Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 97,862	$ 88,694	$ 284,186	$ 246,318
Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	97,862	88,694	284,186	236,318
Revenue from collaborative arrangements with a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	0	0	0	10,000
GSK
Revenue Recognition and Collaborative Arrangements
Total net revenue	97,862	88,694	284,186	246,318
GSK \| Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	101,318	92,150	294,554	246,686
Less: amortization of capitalized fees paid to a related party	(3,456)	(3,456)	(10,368)	(10,368)
Total net revenue	97,862	88,694	284,186	236,318
GSK \| RELVAR/BREO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	54,092	63,893	176,398	165,612
GSK \| ANORO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	11,641	11,882	34,101	32,931
GSK \| TRELEGY
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	35,585	16,375	84,055	48,143
GSK \| Revenue from collaborative arrangements with a related party \| Strategic alliance - MABA program
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 0	$ 0	$ 0	$ 10,000

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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