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Earnings Per Common Share ("EPS") - Potential Dilutive Securities Outstanding that are Considered Antidilutive (Parenthetical) (Detail) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2020
RSU |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |
Share delivery percentage in accordance with valuation assessment obtained | 100.00% | 0.00% | 300.00%

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- Definition Share delivery percentage. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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

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