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Collaborations, Licensing and Other Arrangements - Additional Information (Detail) - USD ($)		1 Months Ended				3 Months Ended		6 Months Ended
	Oct. 31, 2018	Apr. 30, 2026	Aug. 31, 2025	Dec. 31, 2023	May 31, 2018	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue - current						$ 11,085,000		$ 11,085,000		$ 15,331,000
Deferred revenue - non-current						36,857,000		36,857,000		39,977,000
Total revenue from UT						109,374,000	$ 76,527,000	199,544,000	$ 154,881,000
Milestone payments									639,000
Cipla Ltd
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						0		100,000
Collaborations and services
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						35,022,000	22,845,000	58,536,000	52,221,000
AFREZZA product sales
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						41,982,000	22,454,000	75,889,000	41,427,000
United Therapeutics Corporation
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						66,892,000	53,452,000	122,655,000	112,275,000
United Therapeutics Corporation \| Manufacturing Services
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						2,400,000	900,000	$ 2,400,000	1,200,000
Collaboration and License Agreement \| United Therapeutics Corporation
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Royalty percentage	10.00%
Royalty future net sales percentage				1.00%
Royalty retaining percentage				9.00%
License agreement description								There have been various amendments to the CSA since inception. Under the Seventh Amendment, the term of the CSA continues until December 31, 2031 (unless earlier terminated) and is thereafter renewed automatically for additional, successive two-year terms unless (i) UT provides notice to the Company at least 24 months in advance of such renewal that UT does not wish to renew the CSA or (ii) the Company provides notice to UT at least 48 months in advance of such renewal that the Company does not wish to renew the CSA
UT License Agreement
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Upfront payment received			$ 5,000,000
Development milestones			$ 35,000,000
Percentage of royalty on net sales			10.00%
Supplemental payment received		$ 5,000,000
Deferred revenue - current						3,100,000		$ 3,100,000
Total revenue from UT								6,900,000
Initial upfront payment and supplemental payment						10,000,000		10,000,000
UT License Agreement \| Constrained
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Development milestones			$ 35,000,000
Commercial Supply Agreement \| United Therapeutics Corporation
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Deferred revenue						44,900,000		44,900,000		51,300,000
Deferred revenue - current						8,000,000		8,000,000		11,300,000
Deferred revenue - non-current						36,900,000		36,900,000		$ 40,000,000
Commercial Supply Agreement \| United Therapeutics Corporation \| Collaborations and services
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						29,599,000	22,224,000	51,613,000	51,042,000
Co-Promotion Agreement \| Amphastar
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Performance obligation transaction price recognized						500,000	500,000	1,000,000	1,000,000
Co-Promotion Agreement \| Collaborations and services \| Amphastar
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT						$ 500,000	500,000	$ 1,000,000	1,000,000
License and Distribution Agreement \| Cipla Ltd
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Marketing and distribution agreement date					2018-05
License and Distribution Agreement \| Collaborations and services \| Cipla Ltd
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT							37,000		73,000
License and Distribution Agreement \| Collaborations and services \| India \| Cipla Ltd
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Total revenue from UT							$ 0		$ 0