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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 | $ 900,000 us-gaap_AmortizationOfFinancingCostsAndDiscounts | $ 900,000 us-gaap_AmortizationOfFinancingCostsAndDiscounts | $ 800,000 us-gaap_AmortizationOfFinancingCostsAndDiscounts |
Senior convertible notes due August 15, 2015 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal amount | 100,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember | 100,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember |  | 100,000,000 us-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 | 2,400,000 us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember | 2,400,000 us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember |  |
No of convertible shares |  |  |  | 147.0859 us-gaap_DebtInstrumentConvertibleConversionRatio1 / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Principal amount per share |  |  |  | $ 1,000 mnkd_PrincipalAmountPerShare / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Conversion price of shares |  |  |  | $ 6.80 us-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 |  |  |  | 20 us-gaap_DebtInstrumentConvertibleThresholdTradingDays / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember
Consecutive trading days |  |  |  | 30 days
Debt Issuance Cost |  |  |  | $ 4,200,000 us-gaap_DebtIssuanceCosts / us-gaap_LongtermDebtTypeAxis = mnkd_SeniorConvertibleNotesDueTwoThousandFifteenMember

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 + Details
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- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(5)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Conversion Rate -URI http://asc.fasb.org/extlink&oid=6509012 + Details
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- Definition 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. + References No definition available. + Details
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- 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 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Definition Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees). + References No definition available. + Details
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