Revenue - Condensed Statement Of Operations (Details) - Viatris collaboration agreement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Development and Collaboration Agreement
Revenue from collaborative arrangements	$ 10,397	$ 10,996	$ 31,716	$ 32,246
YUPELRI Monotherapy
Development and Collaboration Agreement
Revenue from collaborative arrangements	$ 13,800	$ 13,000	$ 41,300	$ 36,400
Percentage of net sales			35.00%	35.00%