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Consolidated Statements of Income (Loss) (Parentheticals)		12 Months Ended
	Apr. 21, 2025	Jun. 30, 2025
Consolidated Statements of Income (Loss)
Exchange ratio for conversion of shares	1.3728	1.3728

X

- Definition

Represents the exchange ratio for conversion of shares.

+ References

No definition available.

+ Details

Name:	mara_ConversionOfSharesExchangeRatio
Namespace Prefix:	mara_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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