Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 1,328,837	$ 2,863,036
30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	535,696	1,407,524
60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	114,338
90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	793,141	1,341,174
Construction, Land, Development
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	69,174
Construction, Land, Development | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	69,174
Construction, Land, Development | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Construction, Land, Development | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | 1-4 Family Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	1,123,172	2,354,657
Residential | 1-4 Family Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	535,696	1,274,585
Residential | 1-4 Family Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	114,338
Residential | 1-4 Family Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	587,476	965,734
Residential | 1-4 Family Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	57,574
Residential | 1-4 Family Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | 1-4 Family Non-Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | 1-4 Family Non-Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	57,574
Residential | Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | Multifamily | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | Multifamily | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Residential | Multifamily | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	182,532	189,249
Commercial | Commercial Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	182,532	189,249
Commercial | Commercial Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Non-Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial | Commercial Non-Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	23,133	192,382
Consumer | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	63,765
Consumer | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Consumer | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 23,133	$ 128,617