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Securities Available-for-Sale - Schedule of amortized cost and fair values of securities available-for-sale by contractual maturity (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Due after one year through five years, Amortized Cost | $ 6,588 |  |
Due after five years through ten years, Amortized Cost | 5,264 |  |
Due after ten years, Amortized Cost | 30,699 |  |
Total U.S. Government-sponsored enterprises obligations ("GSE"), municipal bonds, corporate debt and corporate subordinated debt, Amortized Cost | 42,551 |  |
Mortgage-backed securities, Amortized Cost | 149,415 |  | $ 129,814
Due after one year through five years, Fair Value | 6,484 |  |
Due after five years through ten years, Fair Value | 4,854 |  |
Due after ten years, Fair Value | 27,024 |  |
Total U.S. Government-sponsored enterprises obligations ("GSE"), municipal bonds, corporate debt and corporate subordinated debt, Fair Value | 38,362 |  |
Mortgage-backed securities, Fair Value | 142,520 |  | 120,217
U.S. Government agency small business pools guaranteed by SBA [Member] |  |  |
Mortgage-backed securities, Amortized Cost | 11,981 | [1] | 14,011
Mortgage-backed securities, Fair Value | 11,222 | [1] | 13,125
Collateralized mortgage obligations issued by the FHLMC, FNMA, and GNMA [Member] |  |  |
Mortgage-backed securities, Amortized Cost | 34,584 | [1] | 19,924
Mortgage-backed securities, Fair Value | 34,951 | [1] | 19,362
Residential mortgage-backed GSE securities [Member] |  |  |
Mortgage-backed securities, Amortized Cost | 60,299 | [1] | 52,452
Mortgage-backed securities, Fair Value | $ 57,985 | [1] | $ 48,462
[1] | Actual maturities for these debt securities are dependent upon the interest rate environment and prepayments on the underlying loans.

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