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Loans and Allowance for Loan Losses - Non Accruals (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Jun. 30, 2020
--- | --- | ---
Mortgages on real estate: |  |
Total | $ 94 | $ 405
One- to four-family [Member] |  |
Mortgages on real estate: |  |
Total | 35 | 81
Real Estate Loans Home Equity Lines Of Credit [Member] |  |
Mortgages on real estate: |  |
Total |  | 15
Consumer Loans [Member] |  |
Mortgages on real estate: |  |
Total | 4 | 5
Commercial Business Loans [Member] |  |
Mortgages on real estate: |  |
Total | $ 55 | $ 304

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