Income Taxes - Deferred tax asset and liability (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021
Deferred tax asset
Net operating loss	$ 236,800	$ 432,127
Available for sale debt securities	119,187
Deferred loan fees		131,723
Accrued expenses	38,814	29,699
Other	7,038	13,304
Deferred tax asset	401,839	606,853
Deferred tax liability
Property and equipment	67,202	80,471
Allowance for loan losses	21,882	21,882
Mortgage servicing rights	215,327	163,942
Available for sale debt securities		70,596
Deferred loan fees	352
Other	256	247
Deferred tax liability	305,019	337,138
Net deferred tax asset	$ 96,820	$ 269,715