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Concentrations - Additional Information (Detail)	Mar. 31, 2024 Entity
Risks and Uncertainties [Abstract]
Number of financial institutions	2

X

- Definition

The number of financial institutions.

+ References

No definition available.

+ Details

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Namespace Prefix:	mchx_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_RisksAndUncertaintiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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