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Goodwill and Intangible Assets - Schedule of Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Indefinite-lived Intangible Assets [Roll Forward] |  |
Beginning balance | $ 2,600 | $ 2,600
Transfers to developed technology from IPR&D | (2,600) | 0
Ending balance | $ 0 | $ 2,600

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- Definition Intangible Assets, Transfer from IPRD to Developed Tech + References No definition available. + Details
Name: | mxl_IntangibleAssetsTransferfromIPRDtoDevelopedTech
Namespace Prefix: | mxl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration