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Stock Based Compensation Expense Recognized in Accompanying Statements of Operations by Category (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation	$ 48,622us-gaap_AllocatedShareBasedCompensationExpense	$ 45,186us-gaap_AllocatedShareBasedCompensationExpense	$ 13,292us-gaap_AllocatedShareBasedCompensationExpense
Research And Development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation	22,357us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_ResearchAndDevelopmentMember	20,409us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_ResearchAndDevelopmentMember	6,167us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_ResearchAndDevelopmentMember
General and Administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation	$ 26,265us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_GeneralAndAdministrativeMember	$ 24,777us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_GeneralAndAdministrativeMember	$ 7,125us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = mnkd_GeneralAndAdministrativeMember

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

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