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Description of Business and Significant Accounting Policies - Additional Information (Detail) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 01, 2017 shares | Mar. 31, 2018 USD ($) Distributor Contract shares | Mar. 31, 2017 USD ($) Distributor | Dec. 31, 2017 USD ($) Contract shares | Sep. 30, 2016 shares
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Accumulated deficit |  | $ (2,883,410,000) |  | $ (2,854,898,000) |
Cash and cash equivalents |  | 26,706,000 |  | $ 43,946,000 |
Principal amount of outstanding borrowings |  | $ 140,200,000 |  |  |
Stock split of common stock | 0.2 |  |  |  |
Common stock, shares authorized | shares | 140,000,000 | 280,000,000 |  | 280,000,000 | 700,000,000
Reverse stock split, description |  | The Company’s board of directors approved a 1-for-5 reverse stock split of its outstanding common stock. On March 1, 2017, the Company filed with the Secretary of State of the State of Delaware a Certificate of Amendment of the Company’s Amended and Restated Certificate of Incorporation (the “Charter Amendment”) to effect the 1-for-5 reverse stock split of the Company’s outstanding common stock (the “Reverse Stock Split”) and to reduce the authorized number of shares of the Company’s common stock from 700,000,000 to 140,000,000 shares. The Company’s common stock began trading on the NASDAQ Global Market on a split-adjusted basis when the market opened on March 3, 2017. As a result, prior to March 3, 2017, all common stock share amounts included in these condensed consolidated financial statements have been retroactively reduced by a factor of five, and all common stock per share amounts have been increased by a factor of five, with the exception of the Company’s common stock par value. |  |  |
Net deferred revenue |  |  |  | $ 3,038,000 |
Number of wholesale distributors | Distributor |  | 3 | 3 |  |
Percentage of product shipments to wholesale distributors |  | 87.00% | 93.00% |  |
Revenue - other |  |  | $ 1,750,000 |  |
Third party logistics |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Net deferred revenue |  |  |  | $ 1,500,000 |
AFREZZA product sales |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Percentage of estimated products returned |  | 2.46% |  |  |
Bulk insulin sales |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Revenue - other |  |  | $ 1,700,000 |  |
Insulin |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Loss on purchase commitments |  | $ 112,300,000 |  |  |
Loss on purchase commitments, number of new contracts recognized | Contract |  | 0 |  | 0 |
Tranche B Notes |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Senior notes, effective interest rate |  | 8.75% |  |  |
Principal amount of outstanding borrowings |  | $ 10,000,000 |  |  |
Senior convertible notes due December 31, 2019 |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Senior notes, effective interest rate |  | 9.75% |  |  |
Principal amount of outstanding borrowings |  | $ 35,000,000 |  |  |
Senior convertible notes due December 31, 2019 | Tranche B Notes |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Principal amount of outstanding borrowings |  | $ 45,000,000 |  | $ 54,407,000 |
Deerfield |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Principal amount of outstanding borrowings |  |  |  | 39,400,000 |
Deerfield | Tranche B Notes |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Principal amount of outstanding borrowings |  |  |  | $ 15,000,000 |
Deerfield | Senior convertible notes due December 31, 2019 |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Senior notes, effective interest rate |  | 9.75% |  |  |
Deerfield | Senior convertible notes due December 31, 2019 | Tranche B Notes |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Senior notes, effective interest rate |  | 8.75% |  |  |
Minimum | AFREZZA product sales |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Sales return right following product expiration in months |  | 6 months |  |  |
Minimum | Deerfield | Senior convertible notes due December 31, 2019 | Tranche B Notes |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Available amount of credit facility under covenant restrictions |  | $ 25,000,000 |  |  |
Maximum | AFREZZA product sales |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |
Sales return right following product expiration in months |  | 12 months |  |  |

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