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Loans and Allowance for Credit Losses - Association's Loan Portfolio Aging Analysis (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Jun. 30, 2022 | Mar. 31, 2022
--- | --- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | $ 1,518 | $ 1,791 |
Current | 584,296 | 523,945 |
Total loans | 585,814 | 525,736 | $ 505,712
Total Loans 90 Days Past Due & Accruing | 0 | 47 |
Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 452 |  |
Current | 198,524 | 167,375 |
Total loans | 198,976 | 167,375 | 165,132
Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 243 |  |
Current | 70,886 | 80,418 |
Total loans | 71,129 | 80,418 | 81,399
Total Loans 90 Days Past Due & Accruing | 0 |  |
Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 40 | 99 |
Current | 8,451 | 8,882 |
Total loans | 8,491 | 8,981 | 8,298
One- to four-family [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 763 | 1,692 |
Current | 157,625 | 130,782 |
Total loans | 158,388 | 132,474 | 124,590
Total Loans 90 Days Past Due & Accruing | 0 | 47 |
Multi-family [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Current | 98,891 | 88,247 |
Total loans | 98,891 | 88,247 | 88,566
Home equity lines of credit [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 20 |  |
Current | 7,038 | 6,987 |
Total loans | 7,058 | 6,987 | 6,600
Construction [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Current | 42,881 | 41,254 |
Total loans | 42,881 | 41,254 | $ 31,127
Financing Receivables, 30 to 59 Days Past Due [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 1,200 | 452 |
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 406 |  |
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 36 |  |
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 19 | 78 |
Financing Receivables, 30 to 59 Days Past Due [Member] | One- to four-family [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 739 | 374 |
Financing Receivables, 60 to 89 Days Past Due [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 41 | 165 |
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 0 |  |
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 0 |  |
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 21 | 21 |
Financing Receivables, 60 to 89 Days Past Due [Member] | One- to four-family [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 0 | 144 |
Financing Receivables, 60 to 89 Days Past Due [Member] | Home equity lines of credit [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 20 |  |
Financing Receivables, 90 Days or Greater [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 277 | 1,174 |
Financing Receivables, 90 Days or Greater [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 46 |  |
Financing Receivables, 90 Days or Greater [Member] | Commercial [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | 207 |  |
Financing Receivables, 90 Days or Greater [Member] | One- to four-family [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Total Past Due | $ 24 | $ 1,174 |

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