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Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Retirement Benefits [Abstract] |  |  |  |
Minimum age required to be eligible to participate in the 401(k) plan |  |  | 21 years |
Expenses accrued relating to employer matching contributions | $ 1,056 | $ 820 | $ 2,827 | $ 2,356

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- Definition Represents the required minimum age of employees of the entity to be eligible to participate in the defined contribution 401(k) plan. + References No definition available. + Details
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Namespace Prefix: | mc_
Data Type: | xbrli:durationItemType
Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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