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Collaborations and Licensing Arrangements - Additional Information (Detail) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
May 31, 2018 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Sep. 30, 2019 | Oct. 31, 2018 | Sep. 30, 2018
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred revenue — current |  | $ 32,184,000 |  | $ 32,184,000 |  |  | $ 32,503,000 |  |  |
Deferred revenue — long term |  | 4,860,000 |  | 4,860,000 |  |  | $ 8,344,000 |  |  |
Revenue' collaborations and services |  | 15,114,000 | $ 15,002,000 | 31,349,000 | $ 32,450,000 |  |  |  |  |
AFREZZA product sales |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue' collaborations and services |  | 6,985,000 | 6,065,000 | 14,985,000 | 11,141,000 |  |  |  |  |
Collaboration and License Agreement | Receptor CLA |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred revenue — current |  | 100,000 |  | 100,000 |  |  |  |  |  |
Collaboration and License Agreement | United Therapeutics Corporation |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Upfront payment received |  |  |  |  |  |  |  |  | $ 45,000,000.0 |
Milestone Payment Received |  | 12,500,000 |  |  |  |  |  |  |  |
Potential milestone payments to be receive |  | 12,500,000 |  | 12,500,000 |  |  |  |  |  |
Total transaction price |  | 101,400,000 |  | 101,400,000 |  |  |  |  |  |
Deferred revenue |  | 35,000,000.0 |  | 35,000,000.0 |  |  |  |  |  |
Deferred revenue — current |  | 31,900,000 |  | 31,900,000 |  |  |  |  |  |
Deferred revenue — long term |  | 3,100,000 |  | 3,100,000 |  |  |  |  |  |
Collaboration and License Agreement | United Therapeutics Corporation | Maximum |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Additional option exercise and development milestone payments to be receive |  | 40,000,000.0 |  | 40,000,000.0 |  |  |  |  |  |
Research Agreement | United Therapeutics Corporation |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Upfront payment received |  |  |  |  |  |  |  |  |  | $ 10,000,000.0
Total transaction price |  | 10,000,000.0 |  | 10,000,000.0 |  |  |  |  |  |
Research Agreement | United Therapeutics Corporation | Product Prototype |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Total transaction price |  | 9,000,000.0 |  | $ 9,000,000.0 |  |  |  |  |  |
Revenue performance obligation, method used |  |  |  | The revenue for the product prototype was recognized using an output method (based on project milestones achieved and surveys of performance completed to date). The Company believed that this method best reflected the measure of progress toward complete satisfaction of the performance obligation. |  |  |  |  |  |
Research Agreement | United Therapeutics Corporation | Engineering Consulting Services |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Total transaction price |  | 1,000,000.0 |  | $ 1,000,000.0 |  |  |  |  |  |
Revenue performance obligation, method used |  |  |  | The revenue for the engineering consulting services was recognized using a ratable method until the obligation was satisfied. The Company believed that this method best reflected the measure of progress toward complete satisfaction of the performance obligation. |  |  |  |  |  |
Research Agreement | United Therapeutics Corporation | Maximum |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Potential milestone payments to be receive |  |  |  |  |  |  |  | $ 30,000,000.0 |  |
Supply and Distribution Agreement | AFREZZA product sales | Biomm |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Revenue' collaborations and services |  | 200,000 | $ 0 | $ 200,000 | $ 0 |  |  |  |  |
License and Distribution Agreement | Foreign Country | India Tax Authority |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Income Taxes Paid |  |  |  |  |  | $ 200,000 |  |  |  |
License and Distribution Agreement | Cipla Distribution Agreement |  |  |  |  |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |  |  |  |  |
Deferred revenue |  | 1,900,000 |  | 1,900,000 |  |  |  |  |  |
Deferred revenue — current |  | 200,000 |  | 200,000 |  |  |  |  |  |
Deferred revenue — long term |  | $ 1,700 |  | $ 1,700 |  |  |  |  |  |
Marketing and distribution agreement date | 2018-05 |  |  |  |  |  |  |  |  |

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