Premises and Equipment - Summary Of The Cost And Accumulated Depreciation And Amortization (Detail) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Jun. 30, 2024 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | $ 5,155 | $ 5,151 |
| Less accumulated depreciation and amortization | (2,128) | (1,905) |
| Premises and equipment, net | 3,027 | 3,246 |
| Land [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | 1,553 | 1,553 |
| Bank buildings [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | 1,066 | 1,066 |
| Building Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | 944 | 944 |
| Furniture, fixtures and equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | 1,271 | 1,267 |
| Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Premises and equipment, Gross | $ 321 | $ 321 |