Loans and Allowance for Loan Losses - Past due loans (Details) - USD ($)	Sep. 30, 2021	Jun. 30, 2021
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 1,100,552	$ 1,328,837
30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	389,864	535,696
60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	70,658	0
90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	640,030	793,141
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
Residential | 1-4 Family Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	879,693	1,123,172
Residential | 1-4 Family Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	371,488	535,696
Residential | 1-4 Family Owner Occupied | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	70,658	0
Residential | 1-4 Family Owner Occupied | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	437,547	587,476
Residential | 1-4 Family Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	18,376	0
Residential | 1-4 Family Non-Owner Occupied | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	18,376	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	0
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	181,914	182,532
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	181,914	182,532
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	20,569	23,133
Consumer | 30-59 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans		0
Consumer | 60-89 days, accruing
Loans and Leases Receivable Disclosure [Line Items]
Past due loans		0
Consumer | 90 days & over or nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Past due loans	$ 20,569	$ 23,133