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Summary Of Significant Accounting Policies - Additional Information (Detail) | 0 Months Ended | 12 Months Ended |  |  |  |
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Jul. 18, 2014 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2014 EUR (€) | Jul. 01, 2013 Senior convertible notes due December 31, 2019 USD ($) | Dec. 31, 2014 Senior convertible notes due December 31, 2019 Deerfield USD ($) | Dec. 31, 2014 Senior convertible notes due December 31, 2019 Deerfield Notes Issued in Four Equal Tranches USD ($) | Dec. 31, 2014 Senior convertible notes due December 31, 2019 Deerfield Less portion of commitment asset USD ($) | May 06, 2014 Senior convertible notes due December 31, 2019 Deerfield Less portion of commitment asset USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |
Maturity period of cash equivalents |  | 90 days or less at the time of purchase |  |  |  |  |  |  |  |
Percentage of credit exchange receivable |  | 65.00%mnkd_PercentageOfCreditExchangeReceivable |  |  |  |  |  |  |  |
Prepaid expenses and other current assets |  | $ 20,206,000 us-gaap_PrepaidExpenseAndOtherAssetsCurrent | $ 5,485,000 us-gaap_PrepaidExpenseAndOtherAssetsCurrent |  |  |  |  |  |  |
Prepayment for 2015 quantities of insulin |  | 15,000,000 us-gaap_PrepaidExpenseCurrent |  |  |  |  |  |  |  |
Purchase obligation |  |  |  |  | 120,100,000 us-gaap_PurchaseObligation |  |  |  |  |
Purchase obligation, due in 2015 |  |  |  |  | 23,200,000 us-gaap_PurchaseObligationDueInNextTwelveMonths |  |  |  |  |
Purchase obligation, due in 2016 |  |  |  |  | 23,300,000 us-gaap_PurchaseObligationDueInSecondYear |  |  |  |  |
Purchase obligation, due in 2017 |  |  |  |  | 23,300,000 us-gaap_PurchaseObligationDueInThirdYear |  |  |  |  |
Purchase obligation, due in 2018 |  |  |  |  | 23,300,000 us-gaap_PurchaseObligationDueInFourthYear |  |  |  |  |
Purchase obligation, due in 2019 |  |  |  |  | 23,300,000 us-gaap_PurchaseObligationDueInFifthYear |  |  |  |  |
Supply Agreement expiration period |  | Dec. 31, 2019 |  |  |  |  |  |  |  |
Supply Agreement renewal period |  | 2 years |  |  |  |  |  |  |  |
Consideration received | 9,300,000 mnkd_TotalConsiderationReceived |  |  |  |  |  |  |  |  |
Offset expense associated with intellectual property | 1,400,000 us-gaap_RelatedPartyTransactionAmountsOfTransaction |  |  |  |  |  |  |  |  |
Intellectual property sold, net | 7,900,000 us-gaap_GainLossOnDispositionOfIntangibleAssets |  |  |  |  |  |  |  |  |
Commitment asset at fair value |  |  |  |  |  | 2,900,000 mnkd_LoanCommitmentAssetFairValue / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember | 0 mnkd_LoanCommitmentAssetFairValue / dei_LegalEntityAxis = mnkd_DeerfieldManagementCompanyLpMember / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember |  |  | 1,200,000 mnkd_LoanCommitmentAssetFairValue / us-gaap_CreditFacilityAxis = mnkd_TrancheBMember / dei_LegalEntityAxis = mnkd_DeerfieldManagementCompanyLpMember / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember
Debt facility principal amount |  |  |  |  |  |  |  | 160,000,000 us-gaap_DebtInstrumentRepurchasedFaceAmount / us-gaap_CreditFacilityAxis = mnkd_NotesIssuedInFourEqualTranchesMember / dei_LegalEntityAxis = mnkd_DeerfieldManagementCompanyLpMember / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember | 20,000,000 us-gaap_DebtInstrumentRepurchasedFaceAmount / us-gaap_CreditFacilityAxis = mnkd_TrancheBMember / dei_LegalEntityAxis = mnkd_DeerfieldManagementCompanyLpMember / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember | 20,000,000 us-gaap_DebtInstrumentRepurchasedFaceAmount / us-gaap_CreditFacilityAxis = mnkd_TrancheBMember / dei_LegalEntityAxis = mnkd_DeerfieldManagementCompanyLpMember / us-gaap_LongtermDebtTypeAxis = mnkd_TwoThousandNineteenNotesMember
Interest expense, net of interest capitalized |  | 20,400,000 us-gaap_InterestExpense | 21,500,000 us-gaap_InterestExpense | 21,600,000 us-gaap_InterestExpense |  |  |  |  |  |
Interest cost capitalized |  | $ 800,000 us-gaap_InterestCostsCapitalized | $ 400,000 us-gaap_InterestCostsCapitalized | $ 300,000 us-gaap_InterestCostsCapitalized |  |  |  |  |  |

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