Accrued interest of related party debt.

No definition available.

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

- Definition

Amount of leases renewed per month.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Area of office space leased.

+ References

No definition available.

+ Details

Name:	mnkd_AreaOfOfficeSpaceLeased
Namespace Prefix:	mnkd_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Available loan balance cancelled.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Lease expiration month year.

+ References

No definition available.

+ Details

Name:	mnkd_LeaseExpirationMonthYear
Namespace Prefix:	mnkd_
Data Type:	xbrli:gYearMonthItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of credit facility restricted borrowing capacity.

+ References

No definition available.

+ Details

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

- Definition

Loan agreement with related party.

+ References

No definition available.

+ Details

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

- Definition

Number of months advances outstanding.

+ References

No definition available.

+ Details

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

- Definition

Office lease expense.

+ References

No definition available.

+ Details

Name:	mnkd_OfficeLeaseExpense
Namespace Prefix:	mnkd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related party transaction debt instrument prepayment.

+ References

No definition available.

+ Details

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

- Definition

Related party transaction prepayment period.

+ References

No definition available.

+ Details

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

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

+ References

+ Details

Name:	us-gaap_LongTermDebtPercentageBearingFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

+ Details

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

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

- Definition

Date the subsidiary or equity investee issued or sold stock, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockTransactionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of new stock issued during the period.

+ References

Reference 1: 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(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=mnkd_PurchasersMember
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Balance Type:
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- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
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Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_PrincipalOwnerMember
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Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=mnkd_AmendedAgreementMember
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- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
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- Details

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- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mnkd_AlfredMannFoundationMember
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- Details

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Related-Party Arrangements - Additional Information (Detail)			1 Months Ended			12 Months Ended
	Oct. 23, 2017 shares	Oct. 10, 2017 shares	May 31, 2015 USD ($) ft²	Oct. 31, 2013 USD ($)	Oct. 31, 2007 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) shares	Jun. 30, 2017 USD ($)
Related Party Transaction [Line Items]
Interest expense						$ 3,782,000	$ 2,901,000	$ 2,894,000
Common Stock
Related Party Transaction [Line Items]
Number of shares sold in underwritten public offering \| shares	973,236					173,000		1,788,000
Loan Arrangement
Related Party Transaction [Line Items]
Amount available for future borrowings						$ 0	30,100,000
Purchase Agreements
Related Party Transaction [Line Items]
Stock purchase agreements date		Oct. 10, 2017
Purchase Agreements \| Common Stock
Related Party Transaction [Line Items]
Number of shares sold in underwritten public offering \| shares		10,166,600
Charitable Foundation \| Common Stock \| Director
Related Party Transaction [Line Items]
Number of shares sold in underwritten public offering \| shares		166,600
Principal stockholder
Related Party Transaction [Line Items]
Loan agreement with related party				$ 370,000,000	$ 350,000,000
Principal stockholder \| Amended Agreement
Related Party Transaction [Line Items]
Maturity date						Jan. 05, 2020
Principal stockholder \| Loan Arrangement
Related Party Transaction [Line Items]
Accrued interest of related party debt						$ 2,300,000	9,300,000		$ 10,700,000
Available amount of credit facility under covenant restrictions									$ 19,400,000
Fixed borrowing rate						5.84%
Related party transaction prepayment period						90 days
Aggregate principal amount cancelled						$ 105,000,000
Principal amount outstanding under credit facility						79,700,000	49,500,000
Principal stockholder \| Loan Arrangement \| Maximum
Related Party Transaction [Line Items]
Amount prepaid for cancellation of indebtedness						$ 200,000,000
Principal stockholder \| Loan Arrangement \| Minimum
Related Party Transaction [Line Items]
Number of months advances outstanding						12 months
Related Party Debt \| Letter Agreement
Related Party Transaction [Line Items]
Description of variable rate interest						the interest rate will increase to the one-year LIBOR calculated on the date of the initial advance or in effect on the date of default, whichever is greater, plus 5% per annum.
Related Party Debt \| Letter Agreement \| LIBOR
Related Party Transaction [Line Items]
Interest rate (LIBOR)						5.00%
Mann Foundation \| Sublease Agreement
Related Party Transaction [Line Items]
Lease expiration date						Aug. 31, 2017
Mann Foundation \| Sublease Agreement
Related Party Transaction [Line Items]
Area of office space leased \| ft²			12,500
Lease expiration period						2017-04
Amount of leases renewed per month			$ 20,000
Lease payments						$ 200,000	$ 300,000	$ 200,000