Off-Balance-Sheet Activities (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Other Commitments [Line Items]
Percentage outstanding with fixed interest rate	81.00%	72.00%
Percentage outstanding with variable interest rate	19.00%	28.00%
Commitments to grant loans
Other Commitments [Line Items]
Other commitments	$ 4,025,000	$ 5,824,000
Unused commitments under lines of credit
Other Commitments [Line Items]
Other commitments	6,707,000	9,352,000
MPF credit enhancements
Other Commitments [Line Items]
Other commitments	$ 838,277	$ 680,777