Contingent Liability

No definition available.

Name:	mnkd_ContingentLiability
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contingent liability remaining payable amount.

+ References

No definition available.

+ Details

Name:	mnkd_ContingentLiabilityRemainingPayableAmount
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument additional borrowing capacity.

+ References

No definition available.

+ Details

Name:	mnkd_DebtInstrumentAdditionalBorrowingCapacity
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Milestone rights liabilities current.

+ References

No definition available.

+ Details

Name:	mnkd_MilestoneRightsLiabilitiesCurrent
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Milestone rights liabilities current and noncurrent.

+ References

No definition available.

+ Details

Name:	mnkd_MilestoneRightsLiabilitiesCurrentAndNoncurrent
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Milestone rights liabilities noncurrent.

+ References

No definition available.

+ Details

Name:	mnkd_MilestoneRightsLiabilitiesNoncurrent
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Payment for milestone rights liabilities.

+ References

No definition available.

+ Details

Name:	mnkd_PaymentForMilestoneRightsLiabilities
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

+ Details

Name:	us-gaap_DebtConversionConvertedInstrumentAmount1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.10)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_EscrowDeposit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

- Details

Name:	dei_LegalEntityAxis=mnkd_DeerfieldManagementCompanyLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=mnkd_MilestoneRightsLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_BalanceSheetLocationAxis=mnkd_RestrictedCashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnkd_TwoThousandNineteenNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
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Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnkd_FacilityFinancingObligationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
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- Details

Name:	us-gaap_BalanceSheetLocationAxis=mnkd_AccruedExpensesAndOtherCurrentLiabilitiesMember
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- Details

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Borrowings - Facility Financing Obligation - Additional Information (Detail) - USD ($)		3 Months Ended		12 Months Ended	24 Months Ended
	Jul. 18, 2019	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2018	Jul. 01, 2013
Debt Instrument [Line Items]
Principal amount			$ 99,200,000
Milestone rights liability			7,201,000			$ 7,201,000
Deerfield \| Milestone Rights Liability
Debt Instrument [Line Items]
Contingent liability for milestone payments			75,000,000
Contingent liability for milestone payments, remain payable amount							$ 75,000,000
Deerfield \| Milestone Rights Liability \| Maximum
Debt Instrument [Line Items]
Contingent liability for milestone payments			90,000,000				90,000,000
Deerfield \| Restricted Cash
Debt Instrument [Line Items]
Escrow deposit			5,000,000
Deerfield \| 2019 notes
Debt Instrument [Line Items]
Principal amount							$ 160,000,000
Debt instrument, remaining borrowing capacity			60,000,000
Deerfield \| 2019 notes \| Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 4,000,000
Deerfield \| Facility Financing Obligation
Debt Instrument [Line Items]
Principal amount			9,000,000
Conversion of notes to common shares, value					$ 100,000,000
Debt instrument, remaining borrowing capacity			80,000,000
Debt issuance costs			200,000
Remaining milestone rights liability			8,900,000			8,900,000
Required payment for milestone liability			5,000,000
Milestone rights liability			7,200,000			7,200,000
Deerfield \| Facility Financing Obligation \| Scenario Forecast
Debt Instrument [Line Items]
Required payment for milestone liability		$ 5,000,000
Deerfield \| Facility Financing Obligation \| Accrued Expenses and Other Current Liabilities
Debt Instrument [Line Items]
Milestone rights liability, current			1,600,000			$ 1,600,000
Deerfield \| Tranche B notes
Debt Instrument [Line Items]
Debt instument additional borrowing capacity				$ 20,000,000
Debt instrument, remaining borrowing capacity			$ 20,000,000