Commitments and Credit Risk - Additional Information (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Commitments And Contingencies Disclosure [Line Items] | ||
| Outstanding commitments to originate loans amount | $ 7,631,000 | $ 8,317,000 |
| Loan amount commitments at fixed rates of interest | $ 5,296,000 | $ 2,028,000 |
| Weighted average interest rates for fixed rate loan commitments | 7.18% | 7.43% |
| Off-Balance-Sheet, Credit loss, Liability | $ 75,000 | $ 98,000 |
| Off-Balance-Sheet, Credit Loss,Credit Loss Expense | 23,000 | 118,000 |
| Commercial [Member] | ||
| Commitments And Contingencies Disclosure [Line Items] | ||
| Lines of credit to borrowers | 55,815,000 | 58,696,000 |
| Open End Consumer Lines [Member] | ||
| Commitments And Contingencies Disclosure [Line Items] | ||
| Lines of credit to borrowers | $ 13,843,000 | $ 12,545,000 |