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Commitments and Contingencies - Additional Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 USD ($) | Jun. 30, 2022 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |
Proceeds received from other party, deferred in other long-term liabilities | $ 4.0 | $ 4.0
Proceeds received from other party recognized | $ 0.0 | $ 3.8

X
- Definition Research and Development Arrangement, Contract For A Jointly Funded Project, Cumulative Proceeds Received From Other Party, Deferred in Liabilities + References No definition available. + Details
Name: | mxl_ResearchAndDevelopmentArrangementContractForAJointlyFundedProjectCumulativeProceedsReceivedFromOtherPartyDeferredInLiabilities
Namespace Prefix: | mxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Research and Development Arrangement, Contract For A Jointly Funded Project, Cumulative Proceeds Received From Other Party, Recognized + References No definition available. + Details
Name: | mxl_ResearchAndDevelopmentArrangementContractForAJointlyFundedProjectCumulativeProceedsReceivedFromOtherPartyRecognized
Namespace Prefix: | mxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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