XML 43 R35.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Concentrations - Additional Information (Detail) | Sep. 30, 2022 Entity
--- | ---
Risks And Uncertainties [Abstract] |
Number of financial institutions | 2

X
- 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

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