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New Accounting Pronouncements - Additional Information (Detail) - USD ($) | Dec. 31, 2022 | Sep. 30, 2022 | Jul. 01, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) | $ 42,714,000 |  |  | $ 40,362,000 |  |  |
Allowance for loan losses | 7,166,000 | $ 7,023,000 |  | 7,052,000 | $ 6,395,000 | $ 6,470,000 | $ 6,599,000
Off-Balance-Sheet, Credit Loss, Liability | $ 434,000 |  | $ 496,000 | $ 0 |  |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) |  |  | 388,000 |  |  |  |
Allowance for loan losses |  |  | 47,000 |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability |  |  | $ 496,000 |  |  |  |

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