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Accounts Receivable - Additional Information (Detail)	3 Months Ended
	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%

X

- Definition

Number of wholesale distributors.

+ References

No definition available.

+ Details

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Namespace Prefix:	mnkd_
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X

- 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

X

- 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

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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