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Fair Value Measurements - Summary of fair value measurements on recurring and non-recurring basis (Details) - USD ($) | Dec. 31, 2024 | Dec. 31, 2023
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Fair Value Measurements |  |
Securities available for sale | $ 107,949,000 | $ 139,427,000
Assets, fair value disclosure | 120,125,000 | 139,825,000
Specific reserve amount | 139,000 | 201,000
Level 1 |  |
Fair Value Measurements |  |
Assets, fair value disclosure | 14,188,000 | 7,476,000
Level 2 |  |
Fair Value Measurements |  |
Assets, fair value disclosure | 104,943,000 | 131,951,000
Level 3 |  |
Fair Value Measurements |  |
Assets, fair value disclosure | 994,000 | 398,000
U.S. Treasury securities |  |
Fair Value Measurements |  |
Securities available for sale |  | 6,945,000
State and Municipal |  |
Fair Value Measurements |  |
Securities available for sale | 32,411,000 | 33,729,000
Mortgage-backed |  |
Fair Value Measurements |  |
Securities available for sale | 38,601,000 | 46,114,000
Corporate securities |  |
Fair Value Measurements |  |
Securities available for sale | 1,341,000 | 1,284,000
Recurring | U.S. Treasury securities |  |
Fair Value Measurements |  |
Securities available for sale |  | 6,945,000
Recurring | U.S. Treasury securities | Level 1 |  |
Fair Value Measurements |  |
Securities available for sale |  | 6,945,000
Recurring | State and Municipal |  |
Fair Value Measurements |  |
Securities available for sale | 43,593,000 | 33,729,000
Recurring | State and Municipal | Level 1 |  |
Fair Value Measurements |  |
Securities available for sale | 11,182,000 |
Recurring | State and Municipal | Level 2 |  |
Fair Value Measurements |  |
Securities available for sale | 32,411,000 | 33,729,000
Recurring | Mortgage-backed |  |
Fair Value Measurements |  |
Securities available for sale | 74,197,000 | 97,469,000
Recurring | Mortgage-backed | Level 1 |  |
Fair Value Measurements |  |
Securities available for sale | 3,006,000 | 531,000
Recurring | Mortgage-backed | Level 2 |  |
Fair Value Measurements |  |
Securities available for sale | 71,191,000 | 96,938,000
Recurring | Corporate securities |  |
Fair Value Measurements |  |
Securities available for sale | 1,341,000 | 1,284,000
Recurring | Corporate securities | Level 2 |  |
Fair Value Measurements |  |
Securities available for sale | 1,341,000 | 1,284,000
Non-recurring |  |
Fair Value Measurements |  |
Impaired loans | 994,000 | 398,000
Non-recurring | Level 3 |  |
Fair Value Measurements |  |
Impaired loans | $ 994,000 | $ 398,000

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