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Property and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Depreciation and Other Amortization Expenses [Line Items]
Amortization period of lease hold improvements	4 years
Depreciation and amortization expense	$ 9.8us-gaap_DepreciationDepletionAndAmortization	$ 11.5us-gaap_DepreciationDepletionAndAmortization	$ 13.0us-gaap_DepreciationDepletionAndAmortization

X

- Definition

Amortization period of lease hold improvements.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnkd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	mnkd_DepreciationAndOtherAmortizationExpensesLineItems
Namespace Prefix:	mnkd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration