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Accounts Receivable - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 Distributor
Accounts Receivable [Line Items] |  |
Number of wholesale distributors |  | 3
Percentage of gross sales from major wholesale distributors | 82.00% | 82.00%
Commercial product sales |  |
Accounts Receivable [Line Items] |  |
Percentage of accounts receivable from major wholesale distributors | 88.00% | 88.00%

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- Definition Number of wholesale distributors. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of accounts receivable from major customers. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage of sales from major customers. + References No definition available. + Details
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Namespace Prefix: | mnkd_
Data Type: | num: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
Name: | srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |