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Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net loss $ (198,382)us-gaap_NetIncomeLoss $ (191,490)us-gaap_NetIncomeLoss $ (169,366)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provide by (used in) operating activities:      
Depreciation and accretion 18,575us-gaap_DepreciationAndAmortization 14,057us-gaap_DepreciationAndAmortization 14,402us-gaap_DepreciationAndAmortization
Stock-based compensation expense 48,622us-gaap_ShareBasedCompensation 45,186us-gaap_ShareBasedCompensation 13,292us-gaap_ShareBasedCompensation
Loss (gain) on sale, abandonment/disposal or impairment of property and equipment 97mnkd_GainLossOnSaleAbandonmentDisposalOrImpairmentOfPropertyAndEquipment 817mnkd_GainLossOnSaleAbandonmentDisposalOrImpairmentOfPropertyAndEquipment 682mnkd_GainLossOnSaleAbandonmentDisposalOrImpairmentOfPropertyAndEquipment
Loss on available-for-sale securities     117us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet
Write-off of derivative liability (363)mnkd_WriteOffOfDerivativeLiability    
Fair value of forward purchase contract     1,237us-gaap_UnrealizedGainLossOnDerivatives
Common shares issued pursuant to litigation settlement     438mnkd_CommonSharesIssuedPursuantToLitigationSettlement
Commitment to deliver common shares pursuant to litigation settlement     6,056us-gaap_OtherOperatingActivitiesCashFlowStatement
Other, net (10)us-gaap_OtherNoncashIncomeExpense 2us-gaap_OtherNoncashIncomeExpense (2)us-gaap_OtherNoncashIncomeExpense
Changes in assets and liabilities:      
State research and development credit exchange receivable (13)mnkd_StateResearchAndDevelopmentCreditExchangeReceivable 466mnkd_StateResearchAndDevelopmentCreditExchangeReceivable (290)mnkd_StateResearchAndDevelopmentCreditExchangeReceivable
Inventory (9,670)us-gaap_IncreaseDecreaseInInventories    
Receivables from collaboration (50,436)us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables    
Prepaid expenses and other current assets (14,721)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (965)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets (1,545)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Other assets (615)us-gaap_IncreaseDecreaseInOtherOperatingAssets    
Accounts payable 3,622us-gaap_IncreaseDecreaseInAccountsPayable (1,071)us-gaap_IncreaseDecreaseInAccountsPayable 44us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses and other current liabilities 2,276us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities 3,675us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities 15,075us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities
Deferred cash payments from collaboration 200,436us-gaap_IncreaseDecreaseInDeferredLiabilities    
Other liabilities 2,915us-gaap_IncreaseDecreaseInOtherOperatingLiabilities 591us-gaap_IncreaseDecreaseInOtherOperatingLiabilities  
Net cash provided by (used in) operating activities 4,086us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (128,732)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (119,860)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES:      
Purchase of property and equipment (24,097)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (7,987)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (637)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Proceeds from sale of property and equipment     77us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Net cash used in investing activities (24,097)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (7,987)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (560)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES:      
Issuance of common stock and warrants, net of issuance costs 40,120mnkd_ProceedsFromIssuanceOfCommonStockAndWarrantsNet 52,421mnkd_ProceedsFromIssuanceOfCommonStockAndWarrantsNet 167,735mnkd_ProceedsFromIssuanceOfCommonStockAndWarrantsNet
Exercise of warrants for common stock   94,147us-gaap_ProceedsFromWarrantExercises  
Payment of 2013 notes   (115,000)us-gaap_RepaymentsOfSeniorDebt  
Proceeds from issuance of facility financing obligation & milestone rights 40,000us-gaap_ProceedsFromIssuanceOfDebt 119,500us-gaap_ProceedsFromIssuanceOfDebt  
Facility financing obligation & milestone rights issuance costs   (598)us-gaap_PaymentsOfDebtIssuanceCosts  
Payment of milestone rights (3,150)mnkd_MilestonePayments    
Borrowings on notes payable to principal stockholder     12,750us-gaap_ProceedsFromRelatedPartyDebt
Payment of employment taxes related to vested restricted stock units (26,908)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation (4,801)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation (906)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Net cash provided by financing activities 70,062us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 145,669us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 179,579us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 50,051us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 8,950us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 59,159us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD 70,790us-gaap_CashAndCashEquivalentsAtCarryingValue 61,840us-gaap_CashAndCashEquivalentsAtCarryingValue 2,681us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, END OF PERIOD 120,841us-gaap_CashAndCashEquivalentsAtCarryingValue 70,790us-gaap_CashAndCashEquivalentsAtCarryingValue 61,840us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL CASH FLOWS DISCLOSURES:      
Interest paid in cash, net of amounts capitalized to Construction in progress 11,218us-gaap_InterestPaid 13,452us-gaap_InterestPaid 9,755us-gaap_InterestPaid
Issuance of common stock pursuant to debt conversion by Deerfield 93,500us-gaap_DebtConversionOriginalDebtAmount1 6,500us-gaap_DebtConversionOriginalDebtAmount1  
Non-cash construction in progress and property and equipment 1,768us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid 856us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid 4,072us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid
Capitalization of interest on note payable to principal stockholder   7,886us-gaap_InterestPaidCapitalized 14,219us-gaap_InterestPaidCapitalized
Reduction of principal on note payable to principal stockholder upon issuance of common stock and exercise of warrants   78,000mnkd_CancellationOfPrincipalOnNotePayableToRelatedParty 184,537mnkd_CancellationOfPrincipalOnNotePayableToRelatedParty
Forward purchase contracts contribution to additional paid-in capital     29,317mnkd_ForwardPurchaseContractContributionToAdditionalPaidInCapital
Reclassification of forward purchase contracts to additional paid-in capital     28,080mnkd_ReclassificationOfForwardPurchaseContractToAdditionalPaidInCapital
Reclassification of Collaboration loan facility obligation 3,034us-gaap_LoansAssumed1    
Less portion of commitment asset      
Adjustments to reconcile net loss to net cash provide by (used in) operating activities:      
Write-off Tranche B Commitment Asset 1,753mnkd_WriteOffOfCommitmentAsset
/ us-gaap_CreditFacilityAxis
= mnkd_TrancheBMember		    
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from issuance of facility financing obligation & milestone rights $ 20,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_CreditFacilityAxis
= mnkd_TrancheBMember