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Concentrations (Details Textual) | 9 Months Ended
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Sep. 30, 2012 Institution
Concentrations (Textual) [Abstract] |
Concentration Risk, Percentage | 10.00%
Number of financial institution | 1
Percentage of revenue as criteria for major distribution partners | 10.00%
Accounts receivable major customer percentage | 10.00%

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- Details
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Namespace Prefix: | mchx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Entity wide accounts receivable major customer percentage. + References No definition available. + Details
Name: | mchx_EntityWideAccountsReceivableMajorCustomerPercentage
Namespace Prefix: | mchx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of financial institutions. + References No definition available. + Details
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Namespace Prefix: | mchx_
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Balance Type: | na
Period Type: | duration

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- Definition Percentage of revenue as criteria for major advertisers. + References No definition available. + Details
Name: | mchx_PercentageOfRevenueAsCriteriaForMajorAdvertisers
Namespace Prefix: | mchx_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Percentage of revenue as criteria for major distribution partners. + References No definition available. + Details
Name: | mchx_PercentageOfRevenueAsCriteriaForMajorDistributionPartners
Namespace Prefix: | mchx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration