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Concentrations - Additional Information (Detail) | Sep. 30, 2024 Entity
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Risks and Uncertainties [Abstract] |
Number of financial institutions | 2
Concentration risk, threshold percentage | 10.00%

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- Definition Concentration risk threshold percentage. + References No definition available. + Details
Name: | mchx_ConcentrationRiskThresholdPercentage
Namespace Prefix: | mchx_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of financial institutions. + References No definition available. + Details
Name: | mchx_NumberOfFinancialInstitutions
Namespace Prefix: | mchx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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