Revenue Recognition and Collaborative Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 100,806	$ 78,946	$ 186,324	$ 157,624
Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	100,806	68,946	186,324	147,624
Revenue from collaborative arrangements with a related party
Revenue Recognition and Collaborative Arrangements
Total net revenue	0	10,000	0	10,000
GSK
Revenue Recognition and Collaborative Arrangements
Total net revenue	100,806	78,946	186,324	157,624
GSK \| Royalty revenue from a related party
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	104,262	72,402	193,236	154,536
Less: amortization of capitalized fees paid to a related party	(3,456)	(3,456)	(6,912)	(6,912)
Total net revenue	100,806	68,946	186,324	147,624
GSK \| RELVAR/BREO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	65,916	45,570	122,306	101,719
GSK \| ANORO
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	11,960	11,199	22,460	21,049
GSK \| TRELEGY
Revenue Recognition and Collaborative Arrangements
Royalties from a related party	26,386	15,633	48,470	31,768
GSK \| Revenue from collaborative arrangements with a related party \| Strategic alliance - MABA program
Revenue Recognition and Collaborative Arrangements
Total net revenue	$ 0	$ 10,000	$ 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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