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Significant Accounting Policies (Details Textual)	Sep. 30, 2012
Significant Accounting Policies (Textual) [Abstract]
Common stock in deferred acquisition payment	5.00%

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- Definition

Percentage increase to any class B common stock to be issued for any deferred acquisition payment.

+ References

No definition available.

+ Details

Name:	mchx_DeferredAcquisitionPaymentsIncreasePercentage
Namespace Prefix:	mchx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	mchx_SignificantAccountingPoliciesTextualAbstract
Namespace Prefix:	mchx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration