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Accounts Receivable - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2021 Distributor
Receivables [Abstract] |
Number of wholesale distributors | 3
Percentage of accounts receivable from major wholesale distributors | 89.00%
Percentage of gross sales from major wholesale distributors | 82.00%

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- Definition Number of wholesale distributors. + References No definition available. + Details
Name: | mnkd_NumberOfWholesaleDistributors
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
Name: | mnkd_PercentageOfAccountsReceivableFromMajorCustomers
Namespace Prefix: | mnkd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of sales from major customers. + References No definition available. + Details
Name: | mnkd_PercentageOfSalesFromMajorCustomers
Namespace Prefix: | mnkd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration