Fair Value of Assets and Liabilities - Non Recurring Basis (Details) - Level 3 - Non Recurring	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)
Foreclosed assets
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment	$ 2,312,240	$ 2,312,240
Alternative Investment, Valuation Technique [Extensible Enumeration]	mara:CollateralValuationMember
Alternative Investment, Measurement Input [Extensible Enumeration]	us-gaap:MeasurementInputDiscountRateMember
Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	0
Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Alternative Investment, Measurement Input	0.65