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Collaborative Arrangement - Additional Information (Detail) (USD $)
0 Months Ended 3 Months Ended 1 Months Ended
Sep. 23, 2014
Aug. 11, 2014
Mar. 31, 2015
Sep. 30, 2014
May 11, 2015
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Deferred cost     $ 6,251,000us-gaap_DeferredCosts    
License and Collaboration Agreement with Sanofi          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Up-front fee       150,000,000mnkd_UpfrontFee
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
 
Potential milestone payment   725,000,000mnkd_PotentialMilestonePayments
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
725,000,000mnkd_PotentialMilestonePayments
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Profits and losses sharing percentage   35.00%mnkd_ProfitLossSharingAgreementAllocationPercentage
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
35.00%mnkd_ProfitLossSharingAgreementAllocationPercentage
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Maximum secured loan facility 175,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
       
Senior notes, effective interest rate 8.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
       
Prepayment of loan percentage of net cash proceeds sale 100.00%mnkd_PercentageOfNetProceedFromSaleOfNotes
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
       
License and Collaboration Agreement with Sanofi | Sanofi-Aventis Deutschland GmbH          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Profits and losses sharing percentage   65.00%mnkd_ProfitLossSharingAgreementAllocationPercentage
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
65.00%mnkd_ProfitLossSharingAgreementAllocationPercentage
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Deferred revenue from collaboration product shipments     150,000,000us-gaap_DeferredRevenue
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Milestone receivable     50,000,000mnkd_PotentialMilestonePaymentsToBeReceived
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Deferred cost     6,300,000us-gaap_DeferredCosts
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Loss sharing amount reclassified to other long-term liabilities     12,400,000mnkd_LossSharingAgreementAmount
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Maximum secured loan facility     175,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Secured loan facility, amount borrowed     3,000,000us-gaap_ProceedsFromRelatedPartyDebt
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Secured loan facility, amount owed         15,500,000us-gaap_LongTermLoansPayable
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
Paid-in-kind interest         100,000us-gaap_PaidInKindInterest
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
License and Collaboration Agreement with Sanofi | Sanofi-Aventis Deutschland GmbH | Subsequent Event          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Secured loan facility, amount borrowed         12,400,000us-gaap_ProceedsFromRelatedPartyDebt
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
License and Collaboration Agreement with Sanofi | Sanofi-Aventis Deutschland GmbH | AFREZZA product sales          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Deferred revenue from collaboration product shipments     7,100,000us-gaap_DeferredRevenue
/ us-gaap_ProductOrServiceAxis
= us-gaap_ProductMember
/ us-gaap_RelatedPartyTransactionAxis
= mnkd_SanofiAventisMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
License and Collaboration Agreement with Sanofi | Manufacturing Milestone Events          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Milestone payments earned     50,000,000us-gaap_RevenueRecognitionMilestoneMethodRevenueRecognized
/ mnkd_MilestoneEventsAxis
= mnkd_ManufacturingMilestoneEventsMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
Number of milestones achieved     2mnkd_NumberOfMilestonesAchieved
/ mnkd_MilestoneEventsAxis
= mnkd_ManufacturingMilestoneEventsMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
   
License and Collaboration Agreement with Sanofi | Development Milestone Event          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Potential milestone payment   25,000,000mnkd_PotentialMilestonePayments
/ mnkd_MilestoneEventsAxis
= mnkd_DevelopmentMilestoneEventsMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
     
License and Collaboration Agreement with Sanofi | Regulatory Approvals          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Potential milestone payment   50,000,000mnkd_PotentialMilestonePayments
/ mnkd_MilestoneEventsAxis
= mnkd_FilingAndCompletionOfRegulatoryApprovalsMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember
     
License and Collaboration Agreement with Sanofi | Product Sales Milestones          
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]          
Potential milestone payment   $ 650,000,000mnkd_PotentialMilestonePayments
/ mnkd_MilestoneEventsAxis
= mnkd_AchievementOfProductSalesMilestoneMember
/ us-gaap_TypeOfArrangementAxis
= mnkd_CollaborationAndLicenseAgreementMember