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Changes in Fair Value of Level 3 Forward Purchase Contract (Detail) (Fair Value, Inputs, Level 3, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity
Issuance	29,317us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityTransfersIntoLevel3
Adjustments to fair value included in other income (expense)	(1,237)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInOtherComprehensiveIncomeLoss
Transfers to additional paid-in-capital	(28,080)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquitySettlements
Ending Balance	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity
The February 2012 Forward Purchase Contract
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity / us-gaap_DerivativeByNatureAxis = mnkd_FebruaryTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Issuance	1,080us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityTransfersIntoLevel3 / us-gaap_DerivativeByNatureAxis = mnkd_FebruaryTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Adjustments to fair value included in other income (expense)	12,011us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DerivativeByNatureAxis = mnkd_FebruaryTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Transfers to additional paid-in-capital	(13,091)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquitySettlements / us-gaap_DerivativeByNatureAxis = mnkd_FebruaryTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Ending Balance	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity / us-gaap_DerivativeByNatureAxis = mnkd_FebruaryTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
The October 2012 Forward Purchase Contract
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity / us-gaap_DerivativeByNatureAxis = mnkd_OctoberTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Issuance	28,237us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityTransfersIntoLevel3 / us-gaap_DerivativeByNatureAxis = mnkd_OctoberTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Adjustments to fair value included in other income (expense)	(13,248)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquityGainLossIncludedInOtherComprehensiveIncomeLoss / us-gaap_DerivativeByNatureAxis = mnkd_OctoberTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Transfers to additional paid-in-capital	(14,989)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisInstrumentsClassifiedInShareholdersEquitySettlements / us-gaap_DerivativeByNatureAxis = mnkd_OctoberTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Ending Balance	$ 0us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisValueOfInstrumentsClassifiedInShareholdersEquity / us-gaap_DerivativeByNatureAxis = mnkd_OctoberTwentyTwelveForwardContractMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member

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- Definition

Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified in shareholders' equity measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Amount of settlements of financial instrument classified in shareholders' equity measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Amount of transfers of financial instrument classified in shareholders' equity into level 3 of the fair value hierarchy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Fair value of financial instrument classified in shareholders' equity measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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