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Common and Preferred Stock - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Aug. 18, 2010
Class of Stock [Line Items]
Common stock loaned under share lending agreement, shares	9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares	9,000,000mnkd_CommonStockLoanedUnderShareLendingAgreementShares
Nominal lending fee	$ 0.01mnkd_NominalLendingFee
Senior convertible notes due August 15, 2015
Class of Stock [Line Items]
Principal amount	$ 100,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember	100,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember	$ 100,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember

X

- Definition

Common stock loaned under share lending agreement, shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnkd_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Nominal lending fee.

+ References

No definition available.

+ Details

Name:	mnkd_NominalLendingFee
Namespace Prefix:	mnkd_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

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Namespace Prefix:
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Balance Type:
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