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Common and Preferred Stock - Additional Information (Detail) (USD $)
 0 Months Ended 1 Months Ended 12 Months Ended
Dec. 20, 2012
Oct. 18, 2012
May 17, 2012
Feb. 08, 2012
Oct. 31, 2013
Dec. 31, 2012
Oct. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2014
Jun. 30, 2012
Mar. 17, 2012
Aug. 18, 2010
Class of Stock [Line Items]                          
Common stock, shares authorized     350,000,000us-gaap_CommonStockSharesAuthorized     550,000,000us-gaap_CommonStockSharesAuthorized   550,000,000us-gaap_CommonStockSharesAuthorized 550,000,000us-gaap_CommonStockSharesAuthorized 550,000,000us-gaap_CommonStockSharesAuthorized      
Common stock, par value               $ 0.01us-gaap_CommonStockParOrStatedValuePerShare   $ 0.01us-gaap_CommonStockParOrStatedValuePerShare      
Undesignated preferred stock, shares authorized               10,000,000us-gaap_PreferredStockSharesAuthorized   10,000,000us-gaap_PreferredStockSharesAuthorized      
Undesignated preferred stock, par value               $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare   $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare      
Common stock, shares issued               369,391,972us-gaap_CommonStockSharesIssued   406,059,089us-gaap_CommonStockSharesIssued      
Common stock, shares outstanding               369,391,972us-gaap_CommonStockSharesOutstanding   406,059,089us-gaap_CommonStockSharesOutstanding      
Common stock loaned under share lending agreement, shares           9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares   9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares 9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares 9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares      
Nominal lending fee                 $ 0.01mnkd_NominalLendingFee        
Number of Unit Sold in an Underwritten public offering       35,937,500mnkd_UnitsSoldUnderPublicOfferUnderwritten                  
Warrant to purchase of a share of common stock       0.6mnkd_UnitsSoldWarrantPortionConvertibleIntoCommonStock                  
Net proceeds from offering       $ 80,600,000mnkd_ProceedsFromIssuanceOfCommonStockAndWarrants                  
Rate at which warrants are exercisable             $ 2.60us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1            
Restricted Stock Agreed to be Purchased by Lender                     77,200,000mnkd_RestrictedStockAgreedToBePurchasedByLender    
Proceeds from exercise warrants         89,700,000us-gaap_ProceedsFromWarrantExercises     94,147,000us-gaap_ProceedsFromWarrantExercises          
Number of Shares that recorded the portion of the derivative instrument representing equity                   16,500,000mnkd_DerivativeFairValueLiabilitySharesIssuableToLender      
Authorized shares under common stock purchase agreement     250,000,000us-gaap_ForwardContractIndexedToIssuersEquityShares     350,000,000us-gaap_ForwardContractIndexedToIssuersEquityShares              
Change in fair value recognized in other income           12,000,000mnkd_IncreaseDecreaseInFairValueRecognizedInOtherIncome     12,000,000mnkd_IncreaseDecreaseInFairValueRecognizedInOtherIncome        
Valuation of non-equity portion of forward contract     $ 1.69mnkd_FairValueOfUnitsIssued     $ 2.40mnkd_FairValueOfUnitsIssued     $ 2.40mnkd_FairValueOfUnitsIssued        
Discount for lack of marketability     0.42%mnkd_FairValueInputDiscountForLackOfMarketability                    
Underwritten public offering             40,000,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction            
Common Stock Purchase             30,000,000mnkd_CommonStockPurchase            
Additional common stock shares issued             6,000,000mnkd_AdditionalCommonsStockSharesIssuedDuringPeriod            
Additional Purchase Of Common Stock             4,500,000mnkd_AdditionalPurchaseOfCommonStock            
Net proceeds from public offering             86,300,000mnkd_NetProceedsFromPublicOffering            
Warrant entitles the holder to purchase a share of common stock             0.75mnkd_CommonStockIssuableUponExerciseOfWarrantsConversionRatio            
Warrant expiration date             2013-10            
Fair value assumption risk free rate 0.00%us-gaap_FairValueAssumptionsRiskFreeInterestRate 0.11%us-gaap_FairValueAssumptionsRiskFreeInterestRate                      
Fair value input discount rate 1.50%us-gaap_FairValueInputsDiscountRate 2.30%us-gaap_FairValueInputsDiscountRate                      
Current Asset                          
Class of Stock [Line Items]                          
Fair value of forward contract                   28,200,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_BalanceSheetLocationAxis
= mnkd_CurrentAssetMember		      
Additional Paid-in Capital                          
Class of Stock [Line Items]                          
Fair value of forward contract                   15,000,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		      
Other income (expense)                          
Class of Stock [Line Items]                          
Fair value of forward contract                   13,200,000us-gaap_DerivativeFairValueOfDerivativeAsset
/ us-gaap_IncomeStatementLocationAxis
= mnkd_OtherIncomeExpenseMember		      
Warrant                          
Class of Stock [Line Items]                          
Purchased Price of the units by underwriters             2.00mnkd_UnitsSoldByUnderwritingPrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember		            
Other Than Equity                          
Class of Stock [Line Items]                          
Fair value of Non-Equity Portion                       13,100,000mnkd_AggregateAdjustmentOfForwardPurchaseContractToFairValue
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_OtherThanEquityMember		  
Risk Free Interest Rate     0.18%mnkd_FairValueAssumptionRiskFreeInterestRate
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_OtherThanEquityMember		                    
Warrant Liability                          
Class of Stock [Line Items]                          
Number of warrants are exercisable       21,562,500us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_FinancialInstrumentAxis
= mnkd_WarrantLiabilityMember		                  
Rate at which warrants are exercisable       $ 2.40us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_FinancialInstrumentAxis
= mnkd_WarrantLiabilityMember		                  
Duration for Expiration of warrants       4 years                  
Underwriters                          
Class of Stock [Line Items]                          
Number of Unit Sold in an Underwritten public offering       4,687,500mnkd_UnitsSoldUnderPublicOfferUnderwritten
/ mnkd_CommonStockIssuedToByPartyAxis
= mnkd_UnderwritersMember		                  
Purchased Price of the units by underwriters       2.256mnkd_UnitsSoldByUnderwritingPrice
/ mnkd_CommonStockIssuedToByPartyAxis
= mnkd_UnderwritersMember		                  
Public                          
Class of Stock [Line Items]                          
Purchased Price of the units by underwriters       2.40mnkd_UnitsSoldByUnderwritingPrice
/ mnkd_CommonStockIssuedToByPartyAxis
= mnkd_PublicMember		                  
Public Offering                          
Class of Stock [Line Items]                          
Proceeds from exercise warrants                   27,800,000us-gaap_ProceedsFromWarrantExercises
/ mnkd_CommonStockIssuanceTypeAxis
= mnkd_PublicOfferingMember		      
Warrants remained unexercised                   19,500,000us-gaap_WarrantsAndRightsOutstanding
/ mnkd_CommonStockIssuanceTypeAxis
= mnkd_PublicOfferingMember		      
Senior convertible notes due August 15, 2015                          
Class of Stock [Line Items]                          
Principal amount               100,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember		   100,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember		     100,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Private Placement | Warrant                          
Class of Stock [Line Items]                          
Underwritten public offering             40,000,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember		            
Private Placement | Restricted Stock                          
Class of Stock [Line Items]                          
Underwritten public offering             40,000,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember		            
Related Party                          
Class of Stock [Line Items]                          
Units sold composition description       Each unit consisting of one share of common stock and a warrant to purchase 0.6 of a share of common stock                  
Mann Group                          
Class of Stock [Line Items]                          
Common stock, shares outstanding       31,250,000us-gaap_CommonStockSharesOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		                  
Restricted common stock price per share       $ 2.47mnkd_RestrictedCommonStockPricePerShare
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		                  
Restricted Stock Agreed to be Purchased by Lender             107,400,000mnkd_RestrictedStockAgreedToBePurchasedByLender
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		            
Selling price of restricted shares             $ 2.59us-gaap_SaleOfStockPricePerShare
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		            
Amended and restated promissory note outstanding principal amount             350,000,000mnkd_DebtInstrumentAmendedOutstanding
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		            
Mann Group | Warrant                          
Class of Stock [Line Items]                          
Restricted warrants sale price             $ 0.125mnkd_RestrictedWarrantSalePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		            
Mann Group | Forward Purchase Contracts                          
Class of Stock [Line Items]                          
Fair value of the forward purchase contract                   2,000,000mnkd_ForwardPurchaseContractFairValue
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		      
Discount for lack of marketability     2.57%mnkd_FairValueInputDiscountForLackOfMarketability
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		                    
Mann Group | Forward Purchase Contracts | Equity Component                          
Class of Stock [Line Items]                          
Number of Shares that recorded the portion of the derivative instrument representing equity                   14,700,000mnkd_DerivativeFairValueLiabilitySharesIssuableToLender
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_EquityComponentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		      
Fair value of the forward purchase contract                   900,000mnkd_ForwardPurchaseContractFairValue
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_EquityComponentMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		      
Mann Group | Forward Purchase Contracts | Other Than Equity                          
Class of Stock [Line Items]                          
Fair value of the forward purchase contract                   $ 1,100,000mnkd_ForwardPurchaseContractFairValue
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_OtherThanEquityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember		      
Risk Free Interest Rate     0.08%mnkd_FairValueAssumptionRiskFreeInterestRate
/ us-gaap_FinancialInstrumentAxis
= mnkd_ForwardPurchaseContractsMember
/ us-gaap_ForwardContractIndexedToIssuersEquityTypeAxis
= mnkd_OtherThanEquityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= mnkd_MannGroupMember