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Summary Of Significant Accounting Policies - Additional Information (Detail)
 0 Months Ended 12 Months Ended
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   $ 20,206,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent $ 5,485,000us-gaap_PrepaidExpenseAndOtherAssetsCurrent              
Prepayment for 2015 quantities of insulin   15,000,000us-gaap_PrepaidExpenseCurrent                
Purchase obligation         120,100,000us-gaap_PurchaseObligation          
Purchase obligation, due in 2015         23,200,000us-gaap_PurchaseObligationDueInNextTwelveMonths          
Purchase obligation, due in 2016         23,300,000us-gaap_PurchaseObligationDueInSecondYear          
Purchase obligation, due in 2017         23,300,000us-gaap_PurchaseObligationDueInThirdYear          
Purchase obligation, due in 2018         23,300,000us-gaap_PurchaseObligationDueInFourthYear          
Purchase obligation, due in 2019         23,300,000us-gaap_PurchaseObligationDueInFifthYear          
Supply Agreement expiration period   Dec. 31, 2019                
Supply Agreement renewal period   2 years                
Consideration received 9,300,000mnkd_TotalConsiderationReceived                  
Offset expense associated with intellectual property 1,400,000us-gaap_RelatedPartyTransactionAmountsOfTransaction                  
Intellectual property sold, net 7,900,000us-gaap_GainLossOnDispositionOfIntangibleAssets                  
Commitment asset at fair value           2,900,000mnkd_LoanCommitmentAssetFairValue
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember		 0mnkd_LoanCommitmentAssetFairValue
/ dei_LegalEntityAxis
= mnkd_DeerfieldManagementCompanyLpMember
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember		     1,200,000mnkd_LoanCommitmentAssetFairValue
/ us-gaap_CreditFacilityAxis
= mnkd_TrancheBMember
/ dei_LegalEntityAxis
= mnkd_DeerfieldManagementCompanyLpMember
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember
Debt facility principal amount               160,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_CreditFacilityAxis
= mnkd_NotesIssuedInFourEqualTranchesMember
/ dei_LegalEntityAxis
= mnkd_DeerfieldManagementCompanyLpMember
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember		 20,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_CreditFacilityAxis
= mnkd_TrancheBMember
/ dei_LegalEntityAxis
= mnkd_DeerfieldManagementCompanyLpMember
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember		 20,000,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_CreditFacilityAxis
= mnkd_TrancheBMember
/ dei_LegalEntityAxis
= mnkd_DeerfieldManagementCompanyLpMember
/ us-gaap_LongtermDebtTypeAxis
= mnkd_TwoThousandNineteenNotesMember
Interest expense, net of interest capitalized   20,400,000us-gaap_InterestExpense 21,500,000us-gaap_InterestExpense 21,600,000us-gaap_InterestExpense            
Interest cost capitalized   $ 800,000us-gaap_InterestCostsCapitalized $ 400,000us-gaap_InterestCostsCapitalized $ 300,000us-gaap_InterestCostsCapitalized