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Loans and Allowance for Credit Losses - Credit Risk Profile of Association's Loan Portfolio Based on Risk Rating Category and Year of Origination (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | $ 97,323 | $ 56,417
2022 | 206,439 | 212,517
2021 | 100,761 | 99,138
2020 | 83,289 | 86,618
2019 | 28,188 | 29,700
Prior Years | 105,771 | 109,934
Total loans | 621,771 | 594,324
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 97,309 | 53,624
2022 | 206,378 | 212,452
2021 | 100,490 | 98,869
2020 | 81,030 | 84,506
2019 | 27,592 | 29,096
Prior Years | 105,768 | 109,593
Total loans | 618,567 | 588,140
Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2021 | 85 |
Prior Years |  | 335
Total loans | 85 | 335
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 14 | 2,793
2022 | 61 | 65
2021 | 186 | 269
2020 | 2,259 | 2,112
2019 | 596 | 604
Prior Years | 3 | 6
Total loans | 3,119 | 5,849
One- to four-family [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 35,453 | 22,046
2022 | 54,463 | 56,060
2021 | 26,970 | 27,937
2020 | 16,205 | 18,529
2019 | 5,754 | 6,218
Prior Years | 31,309 | 33,064
Total loans | 170,154 | 163,854
One- to four-family [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 35,439 | 22,032
2022 | 54,457 | 56,054
2021 | 26,855 | 27,843
2020 | 16,205 | 18,468
2019 | 5,535 | 5,996
Prior Years | 31,309 | 32,729
Total loans | 169,800 | 163,122
One- to four-family [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2021 | 85 |
Prior Years |  | 335
Total loans | 85 | 335
One- to four-family [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 14 | 14
2022 | 6 | 6
2021 | 30 | 94
2020 |  | 61
2019 | 219 | 222
Total loans | 269 | 397
Multi-family [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 3,477 | 674
2022 | 35,415 | 37,826
2021 | 10,573 | 10,647
2020 | 14,150 | 14,399
2019 | 8,749 | 8,831
Prior Years | 16,813 | 17,272
Total loans | 89,177 | 89,649
Multi-family [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 3,477 | 674
2022 | 35,415 | 37,826
2021 | 10,573 | 10,647
2020 | 14,150 | 14,399
2019 | 8,508 | 8,587
Prior Years | 16,813 | 17,272
Total loans | 88,936 | 89,405
Multi-family [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2019 | 241 | 244
Total loans | 241 | 244
Home equity lines of credit [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 1,804 | 982
2022 | 1,879 | 2,554
2021 | 1,535 | 1,301
2020 | 1,078 | 1,035
2019 | 785 | 789
Prior Years | 1,430 | 1,405
Total loans | 8,511 | 8,066
Home equity lines of credit [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 1,804 | 982
2022 | 1,879 | 2,554
2021 | 1,535 | 1,301
2020 | 1,078 | 1,035
2019 | 785 | 789
Prior Years | 1,430 | 1,405
Total loans | 8,511 | 8,066
Construction [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 15,659 | 2,882
2022 | 32,101 | 29,188
2021 | 16,152 | 10,432
2020 | 8,898 | 8,471
Total loans | 72,810 | 50,973
Construction [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 15,659 | 2,882
2022 | 32,101 | 29,188
2021 | 16,152 | 10,432
2020 | 8,898 | 8,471
Total loans | 72,810 | 50,973
Commercial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 18,049 | 12,214
2022 | 60,728 | 63,645
2021 | 28,548 | 29,320
2020 | 32,432 | 33,364
2019 | 5,654 | 5,925
Prior Years | 48,171 | 49,239
Total loans | 193,582 | 193,707
Commercial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 18,049 | 12,214
2022 | 60,728 | 63,645
2021 | 28,548 | 29,320
2020 | 31,581 | 32,502
2019 | 5,574 | 5,844
Prior Years | 48,171 | 49,239
Total loans | 192,651 | 192,764
Commercial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2020 | 851 | 862
2019 | 80 | 81
Total loans | 931 | 943
Commercial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 19,603 | 15,228
2022 | 19,060 | 20,063
2021 | 15,627 | 17,847
2020 | 9,829 | 9,986
2019 | 7,092 | 7,726
Prior Years | 7,983 | 8,843
Total loans | 79,194 | 79,693
Commercial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 19,603 | 12,449
2022 | 19,005 | 20,004
2021 | 15,471 | 17,673
2020 | 8,421 | 8,797
2019 | 7,036 | 7,669
Prior Years | 7,982 | 8,841
Total loans | 77,518 | 75,433
Commercial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 |  | 2,779
2022 | 55 | 59
2021 | 156 | 174
2020 | 1,408 | 1,189
2019 | 56 | 57
Prior Years | 1 | 2
Total loans | 1,676 | 4,260
Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 3,278 | 2,391
2022 | 2,793 | 3,181
2021 | 1,356 | 1,654
2020 | 697 | 834
2019 | 154 | 211
Prior Years | 65 | 111
Total loans | 8,343 | 8,382
Consumer [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2023 | 3,278 | 2,391
2022 | 2,793 | 3,181
2021 | 1,356 | 1,653
2020 | 697 | 834
2019 | 154 | 211
Prior Years | 63 | 107
Total loans | 8,341 | 8,377
Consumer [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
2021 |  | 1
Prior Years | 2 | 4
Total loans | $ 2 | $ 5

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