Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($)	Mar. 31, 2021	Jun. 30, 2020
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 1,461,212	$ 2,863,036
30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	505,124	1,407,524
60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans		114,338
90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	956,088	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
1-4 Family Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	1,058,691	2,354,657
1-4 Family Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	464,332	1,274,585
1-4 Family Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans		114,338
1-4 Family Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	594,359	965,734
1-4 Family Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	79,265	57,574
1-4 Family Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
1-4 Family Non-Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
1-4 Family Non-Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	79,265	57,574
Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Multifamily | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Multifamily | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Multifamily | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	182,853	189,249
Commercial Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	182,853	189,249
Commercial Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Non-Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Commercial Non-Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Consumer and Installment Loan
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	140,403	192,382
Consumer and Installment Loan | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	40,792	63,765
Consumer and Installment Loan | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans		0
Consumer and Installment Loan | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 99,611	$ 128,617