| Fair Value, by Balance Sheet Grouping [Table Text Block] |
| | | | | | | Fair Value Measurements at | |
| | | Carrying | | | March 31, 2026 | |
| (In thousands) | | Amount | | | Level 1 | | | Level 2 | | | Level 3 | | | Total | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Cash and due from financial institutions | | $ | 10,569 | | | $ | 10,569 | | | $ | - | | | $ | - | | | $ | 10,569 | |
| Due from Federal Reserve Bank and interest-bearing deposits in banks | | | 138,473 | | | | 138,473 | | | | - | | | | - | | | | 138,473 | |
| Loans, net | | | 2,151,908 | | | | - | | | | - | | | | 2,140,411 | | | | 2,140,411 | |
| Accrued interest receivable | | | 9,511 | | | | 9,511 | | | | - | | | | - | | | | 9,511 | |
| | | | | | | | | | | | | | | | | | | | | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Deposits | | | 2,199,319 | | | | - | | | | 2,061,416 | | | | - | | | | 2,061,416 | |
| Subordinated debentures, net | | | 22,000 | | | | - | | | | - | | | | 24,419 | | | | 24,419 | |
| Short-term borrowings | | | 55,000 | | | | 55,000 | | | | - | | | | - | | | | 55,000 | |
| Accrued interest payable | | | 195 | | | | 195 | | | | - | | | | - | | | | 195 | |
| | | | | | | Fair Value Measurements at | |
| | | Carrying | | | December 31, 2025 | |
| (In thousands) | | Amount | | | Level 1 | | | Level 2 | | | Level 3 | | | Total | |
| Financial assets: | | | | | | | | | | | | | | | | | | | | |
| Cash and due from financial institutions | | $ | 7,942 | | | $ | 7,942 | | | $ | - | | | $ | - | | | $ | 7,942 | |
| Due from Federal Reserve Bank and interest-bearing deposits in banks | | | 146,627 | | | | 146,627 | | | | - | | | | - | | | | 146,627 | |
| Loans, net | | | 2,126,178 | | | | - | | | | - | | | | 2,110,338 | | | | 2,110,338 | |
| Accrued interest receivable | | | 9,297 | | | | 9,297 | | | | - | | | | - | | | | 9,297 | |
| | | | | | | | | | | | | | | | | | | | | |
| Financial liabilities: | | | | | | | | | | | | | | | | | | | | |
| Deposits | | | 2,186,073 | | | | - | | | | 2,067,565 | | | | - | | | | 2,067,565 | |
| Subordinated debentures, net | | | 22,000 | | | | - | | | | - | | | | 24,645 | | | | 24,645 | |
| Short-term borrowings | | | 60,000 | | | | 60,000 | | | | - | | | | - | | | | 60,000 | |
| Accrued interest payable | | | 142 | | | | 142 | | | | - | | | | - | | | | 142 | |
|
| Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| | | March 31, 2026 | |
| (In thousands) | | Fair Value | | | Level 1 | | | Level 2 | | | Level 3 | |
| Securities available-for-sale | | | | | | | | | | | | | | | | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | 406 | | | $ | - | | | $ | 406 | | | $ | - | |
| Commercial mortgage-backed securities | | | 5,402 | | | | - | | | | 5,402 | | | | - | |
| Residential mortgage-backed securities | | | 200,132 | | | | - | | | | 200,132 | | | | - | |
| U.S. states and political subdivisions | | | 4,643 | | | | - | | | | 4,643 | | | | - | |
| Total securities available-for-sale | | $ | 210,583 | | | $ | - | | | $ | 210,583 | | | $ | - | |
| | | December 31, 2025 | |
| (In thousands) | | Fair Value | | | Level 1 | | | Level 2 | | | Level 3 | |
| Securities available-for-sale | | | | | | | | | | | | | | | | |
| U.S. Treasury securities and obligations of U.S. government agencies | | $ | 458 | | | $ | - | | | $ | 458 | | | $ | - | |
| Commercial mortgage-backed securities | | | 5,430 | | | | - | | | | 5,430 | | | | - | |
| Residential mortgage-backed securities | | | 207,552 | | | | - | | | | 207,552 | | | | - | |
| U.S. states and political subdivisions | | | 4,720 | | | | - | | | | 4,720 | | | | - | |
| Total securities available-for-sale | | $ | 218,160 | | | $ | - | | | $ | 218,160 | | | $ | - | |
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