Derivative and Other Financial Instruments with Off-Balance Sheet Risks - Schedule of Undisbursed Funds Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Derivative [Line Items]
Total	$ 27,127	$ 27,251
Undisbursed loan funds - Construction loans
Derivative [Line Items]
Total	3,763	4,479
Undisbursed lines of credit - Commercial business loans
Derivative [Line Items]
Total	441	460
Undisbursed lines of credit - Consumer loans
Derivative [Line Items]
Total	415	425
Commitments to extend credit on loans to be held for investment
Derivative [Line Items]
Total	$ 22,508	$ 21,887