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Subsequent Event - Exchange of Mann Group Note - Additional Information (Detail) | Aug. 05, 2019 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) shares | Dec. 31, 2018 shares
--- | --- | --- | ---
Subsequent Event [Line Items] |  |  |
Common stock, shares issued | shares |  | 189,447,055 | 187,029,967
Principal amount |  | $ 99,200,000 |
Subsequent Event | The Mann Group LLC | New Loan Arrangement | Convertible Promissory Note |  |  |
Subsequent Event [Line Items] |  |  |
Conversion price of shares | $ / shares | $ 2.50 |  |
Senior notes, effective interest rate | 7.00% |  |
Debt instrument payment term description | quarterly |  |
Debt instrument, date of first required interest payment | Oct. 01, 2019 |  |
Maturity date | Nov. 03, 2024 |  |
No of convertible shares | 400 |  |
Principal amount per share | $ / shares | $ 1,000 |  |
Subsequent Event | The Mann Group LLC | New Loan Arrangement | Non-Convertible Promissory Note |  |  |
Subsequent Event [Line Items] |  |  |
Senior notes, effective interest rate | 7.00% |  |
Debt instrument payment term description | quarterly |  |
Debt instrument, date of first required interest payment | Oct. 01, 2019 |  |
Debt instrument, maturity date, description | The Mann Group Non-Convertible Note will mature on the earlier of (i) November 3, 2024 or (ii) the 90th day after the repayment in full, and termination and discharge of all obligations (other than contingent indemnity obligations) under the MidCap Credit Facility. Interest on the Mann Group Non-Convertible Note will be payable in kind by adding the amount thereof to the principal amount; provided that MannKind may, at its option, elect to pay any such interest on any interest payment date, if certain conditions are met, in shares of MannKind’s common stock at a price per shall equal to the last reported sale price on the trading day immediately prior to the interest payment date. |  |
Subsequent Event | The Mann Group LLC | Privately Negotiated Exchange Agreement |  |  |
Subsequent Event [Line Items] |  |  |
Repayments of debt | $ 3,000,000 |  |
Common stock, shares issued | shares | 7,142,857 |  |
Conversion price of shares | $ / shares | $ 1.12 |  |
Conversion of notes to common shares, value | $ 70,100,000 |  |
Subsequent Event | The Mann Group LLC | Privately Negotiated Exchange Agreement | New Loan Arrangement | Convertible Promissory Note |  |  |
Subsequent Event [Line Items] |  |  |
Principal amount | 35,000,000 |  |
Subsequent Event | The Mann Group LLC | Privately Negotiated Exchange Agreement | New Loan Arrangement | Non-Convertible Promissory Note |  |  |
Subsequent Event [Line Items] |  |  |
Principal amount | $ 35,050,750 |  |

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