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Loans and Allowance for Loan Losses - Non Accruals (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Jun. 30, 2019
--- | --- | ---
Mortgages on real estate: |  |
Total | $ 270 | $ 541
One- to four-family [Member] |  |
Mortgages on real estate: |  |
Total | 191 | 414
Home equity lines of credit [Member] |  |
Mortgages on real estate: |  |
Total | 17 | 20
Consumer Loans [Member] |  |
Mortgages on real estate: |  |
Total | 8 | 29
Commercial [Member] |  |
Mortgages on real estate: |  |
Total | 6 | 18
Commercial Business Loans [Member] |  |
Mortgages on real estate: |  |
Total | $ 48 | $ 60

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