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Loans and Allowance for Loan Losses - Categories of Loans (Detail) - USD ($) $ in Thousands | Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2019 | Jun. 30, 2019
--- | --- | --- | --- | ---
Real estate loans |  |  |  |
Total loans | $ 525,033 | $ 515,887 | $ 496,903 |
Unearned fees and discounts, net | 286 | (164) |  |
Allowance for loan losses | 6,506 | 6,234 | 6,277 | $ 6,328
Loans, net | 518,241 | 509,817 |  |
One- to four-family [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 125,574 | 128,876 | 126,152 |
Allowance for loan losses | 1,033 | 1,044 | 990 | 1,031
Multi-family [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 106,886 | 96,195 | 105,548 |
Allowance for loan losses | 1,741 | 1,514 | 1,602 | 1,642
Home equity lines of credit [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 8,147 | 8,551 | 8,897 |
Allowance for loan losses | 82 | 87 | 90 | 89
Construction [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 10,050 | 22,042 | 17,267 |
Allowance for loan losses | 85 | 240 | 204 | 213
Commercial [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 157,096 | 145,113 | 146,500 |
Allowance for loan losses | 1,874 | 1,706 | 1,657 | 1,623
Commercial [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 109,182 | 107,581 | 84,825 |
Allowance for loan losses | 1,624 | 1,583 | 1,664 | 1,659
Consumer [Member] |  |  |  |
Real estate loans |  |  |  |
Total loans | 8,098 | 7,529 | 7,714 |
Allowance for loan losses | $ 67 | $ 60 | $ 70 | $ 71

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