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Description of Business and Significant Accounting Policies - Additional Information (Detail) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Apr. 10, 2020 USD ($) | Aug. 06, 2019 USD ($) | Aug. 31, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) Segment Contract | Dec. 31, 2019 USD ($) | Jul. 01, 2013 USD ($)
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Accumulated deficit |  |  |  | $ (3,011,477,000) | $ (3,011,477,000) | $ (2,991,903,000) |
Principal amount |  |  |  | 122,600,000 | 122,600,000 |  |
Cash and cash equivalents |  |  |  | 63,222,000 | $ 63,222,000 | 29,906,000 |
Number of operating segment | Segment |  |  |  |  | 1 |  |
Proceeds from loans |  |  |  |  | $ 4,873,000 |  |
Short-term investments |  |  |  | 0 | 0 | 19,978,000 |
Long-term Investments |  |  |  | 0 | 0 |  |
Remaining milestone rights liability |  |  |  | 7,300,000 | 7,300,000 | 7,300,000 |
Liabilities for uncertain income tax positions |  |  |  | $ 0 | $ 0 |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Change in accounting principle, accounting standards update, adopted [true false] |  |  |  | true | true |  |
Change in accounting principle, accounting standards update, adopted date |  |  |  | Jan. 01, 2020 | Jan. 01, 2020 |  |
Change in accounting principle, accounting standards update, immaterial effect [true false] |  |  |  | true | true |  |
Commitment Asset | Other Expense |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Asset impairment |  |  |  | $ 400,000 | $ 1,900,000 |  |
Insulin |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Loss on purchase commitments |  |  |  | 90,900,000 | $ 90,900,000 | 92,000,000.0 |
Loss on purchase commitments, number of new contracts recognized | Contract |  |  |  |  | 0 |  |
Maximum | AFREZZA product sales |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Sales return right following product expiration in months |  |  |  |  | 12 months |  |
Minimum | AFREZZA product sales |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Sales return right following product expiration in months |  |  |  |  | 6 months |  |
Paycheck Protection Program Loan, CARES Act |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Principal amount |  |  |  | 4,900,000 | $ 4,900,000 |  |
Proceeds from loans | $ 4,900,000 |  |  |  |  |  |
Facility Financing Obligation | Deerfield |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Remaining milestone rights liability |  |  |  | 7,300,000 | 7,300,000 | 7,300,000 |
MidCap Credit Facility |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Principal amount |  |  |  | 40,000,000.0 | 40,000,000.0 | 40,000,000.0 |
Principal amount |  | $ 75,000,000.0 | $ 65,000,000.0 |  |  |  |
Amount outstanding |  |  |  | 40,000,000.0 | 40,000,000.0 | $ 40,000,000.0 |
Amount available under credit facility |  |  | 25,000,000.0 |  |  |  |
Minimum cash covenant |  | 15,000,000.0 |  |  |  |  |
Commitment asset |  |  | 1,500,000 |  |  |  |
Other asset |  |  | 400,000 |  |  |  |
MidCap Credit Facility | Commitment Asset |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Asset impairment |  |  |  | 400,000 | 1,900,000 |  |
MidCap Credit Facility | Tranche 2 |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Amount available under credit facility |  |  | 10,000,000.0 |  |  |  |
Debt instrument, minimum target net revenue |  | 30,000,000.0 | 30,000,000.0 |  |  |  |
Minimum cash covenant |  |  |  | 15,000,000.0 | 15,000,000.0 |  |
MidCap Credit Facility | Tranche 3 |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Amount available under credit facility |  |  | $ 25,000,000.0 |  |  |  |
Minimum cash covenant |  | $ 20,000,000.0 |  | 20,000,000.0 | 20,000,000.0 |  |
Milestone Rights Liability | Deerfield |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Contingent liability remain payable |  |  |  | $ 70,000,000.0 | $ 70,000,000.0 |  |
Milestone Rights Liability | Maximum | Deerfield |  |  |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |
Contingent liability for milestone payments |  |  |  |  |  |  | $ 90,000,000.0

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