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Business Segments and Geographic Information - Summary of Operating Segments (Parenthetical) (Details) $ in Millions	3 Months Ended
	Sep. 30, 2025 USD ($)
Segment Reporting Information [Line Items]
Non-allocated severance expense	$ 0.3

X

- Definition

Non-Allocated Severance Expense

+ References

No definition available.

+ Details

Name:	mhh_Non-AllocatedSeveranceExpense
Namespace Prefix:	mhh_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration