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Loans and Allowance for Loan Losses - Credit Risk Profile of Association's Loan Portfolio Based on Rating Category and Payment Activity (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Jun. 30, 2021
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 525,736 | $ 520,526
Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 513,804 | 512,746
Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans |  | 6,919
Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 11,932 | 861
One- to four-family [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 132,474 | 117,435
One- to four-family [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 130,950 | 116,980
One- to four-family [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 1,524 | 455
Multi-family [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 88,247 | 104,433
Multi-family [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 87,993 | 104,170
Multi-family [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 254 | 263
Home equity lines of credit [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 6,987 | 6,688
Home equity lines of credit [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 6,987 | 6,688
Construction [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 41,254 | 25,345
Construction [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 41,254 | 25,345
Commercial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 167,375 | 155,884
Commercial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 164,424 | 154,833
Commercial [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans |  | 954
Commercial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 2,951 | 97
Commercial [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 80,418 | 103,088
Commercial [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 73,226 | 97,078
Commercial [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans |  | 5,964
Commercial [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 7,192 | 46
Consumer [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 8,981 | 7,653
Consumer [Member] | Pass [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | 8,970 | 7,652
Consumer [Member] | Watch [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans |  | $ 1
Consumer [Member] | Substandard [Member] |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Total loans | $ 11 |

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