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Senior Convertible Notes - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 18, 2010 D
Debt Instrument [Line Items]
Accretion of debt issuance costs	$ 900,000us-gaap_AmortizationOfFinancingCostsAndDiscounts	$ 900,000us-gaap_AmortizationOfFinancingCostsAndDiscounts	$ 800,000us-gaap_AmortizationOfFinancingCostsAndDiscounts
Senior convertible notes due August 15, 2015
Debt Instrument [Line Items]
Principal amount	100,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember	100,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember		100,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Senior notes, effective interest rate	5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember			5.75%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Accrued interest payable	2,400,000us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember	2,400,000us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
No of convertible shares				147.0859us-gaap_DebtInstrumentConvertibleConversionRatio1 / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Principal amount per share				$ 1,000mnkd_PrincipalAmountPerShare / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Conversion price of shares				$ 6.80us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Percentage of repurchase price				100.00%us-gaap_DebtInstrumentRedemptionPricePercentage / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Percentage of conversion price equaling stock price				150.00%us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Number of trading days				20us-gaap_DebtInstrumentConvertibleThresholdTradingDays / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Consecutive trading days				30 days
Debt Issuance Cost				$ 4,200,000us-gaap_DebtIssuanceCosts / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember

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Principal amount per share.

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Amount of noncash expense included in interest expense to allocate debt discount and premium, and the costs to issue debt and obtain financing over the related debt instruments. Alternate captions include noncash interest expense.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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

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Contractual interest rate for funds borrowed, under the debt agreement.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

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Amount of interest payable on debt, including, but not limited to, trade payables.

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