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Loans - Risk category of loans (Details) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		$ 199,935,846
Net change in other assets	$ (750)	(21,880)
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		6,878,209
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		1,905,255
Commercial | Pass | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		6,878,209
Commercial | Pass | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		1,905,255
Commercial Real Estate And Commercial Portfolio
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		93,364,410
Commercial Real Estate And Commercial Portfolio | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		84,580,946
Commercial Real Estate And Commercial Portfolio | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		93,364,410
Commercial Real Estate And Commercial Portfolio | Pass | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		$ 84,580,946

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