Loans - Summary of TDRs (Details)	12 Months Ended
	Jun. 30, 2020 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	$ 0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	195,924
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	195,924
Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	195,924
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	195,924
Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
Construction, land, development
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
Construction, land, development | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
Construction, land, development | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
1-4 family owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	195,924
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	195,924
1-4 family owner occupied | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	195,924
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	195,924
1-4 family owner occupied | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
1-4 family non-owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
1-4 family non-owner occupied | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
1-4 family non-owner occupied | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
Multifamily
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
Multifamily | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
Multifamily | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
Commercial owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
Commercial owner occupied | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
Commercial owner occupied | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
Commercial non-owner occupied
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
Commercial non-owner occupied | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
Commercial non-owner occupied | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	0
Consumer and installment loans
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Transfers from accrual	0
Ending balance	0
Consumer and installment loans | Accruing
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Transfer to other than category	0
Principal payments	0
Charge-offs	0
Sales	0
New restructureds	0
Transfers out of TDR status	0
Transfer to foreclosed properties	0
Transfers to nonaccrual	0
Transfers out of nonaccrual	0
Ending balance	0
Consumer and installment loans | Nonaccrual
Loans and Leases Receivable Disclosure [Line Items]
Beginning balance	0
Principal payments	0
Charge-offs	0
Sales	0
Transfer to foreclosed properties	0
Transfers from accrual	0
Transfers to accrual	0
Ending balance	$ 0