Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($)	Sep. 30, 2019	Jun. 30, 2019
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 3,433,306	$ 4,305,475
30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	1,383,756	2,305,204
60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	853,088	475,403
90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	1,196,462	1,524,868
Construction, Land, Development
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
Construction, Land, Development | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	0	0
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	2,942,133	3,782,455
1-4 Family Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	1,261,160	2,129,016
1-4 Family Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	788,942	450,183
1-4 Family Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	892,031	1,203,256
1-4 Family Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	19,673	103,706
1-4 Family Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	19,673	103,706
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	0	0
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	192,285	193,601
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	192,285	193,601
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
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	279,215	225,713
Consumer | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	102,923	72,482
Consumer | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	64,146	25,220
Consumer | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 112,146	$ 128,011