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Significant Agreements and Contracts - Summary of Revenues Disaggregated by Timing of Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	$ 95,842	$ 0	$ 95,842	$ 0
Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	95,842		95,842
Revenue from sale of US license | Point in Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	76,686		76,686
Revenue from sale of ROW license | Point in Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	12,050		12,050
Revenue from PAH research and development service performance obligation satisfied during reporting period | Over Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	3,398		3,398
Revenue from PH-ILD research and development service performance obligation satisfied during reporting period | Over Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	60		60
Revenue from PAH research and development costs subject to reimbursement | Over Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	3,297		3,297
Revenue from PH-ILD research and development costs subject to reimbursement | Over Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	333		333
Effect of exchange rate changes on revenue | Over Time: | Chiesi
Effect of exchange rate changes on revenue
Total revenue from Chiesi Collaboration Agreement	$ 18		$ 18

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