Investment Securities - Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	$ 134,805	$ 144,893
Available-for-sale, gross unrealized gains	547	738
Available-for-sale, gross unrealized losses	(9,972)	(10,066)
Investment securities available-for-sale, at fair value	125,380	135,565
Held-to-maturity, amortized cost	983	1,104
Held-to-maturity, gross unrealized losses	(62)	(63)
Held-to-maturity, estimated fair value	921	1,041
Residential Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	45,179	47,221
Available-for-sale, gross unrealized gains	460	580
Available-for-sale, gross unrealized losses	(3,086)	(3,073)
Investment securities available-for-sale, at fair value	42,553	44,728
Commercial Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	14,610	9,446
Available-for-sale, gross unrealized gains	3
Available-for-sale, gross unrealized losses	(334)	(406)
Investment securities available-for-sale, at fair value	14,279	9,040
Held-to-maturity, amortized cost	468	575
Held-to-maturity, gross unrealized losses	(20)	(22)
Held-to-maturity, estimated fair value	448	553
US Government Agencies Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	11,645	11,849
Available-for-sale, gross unrealized gains	84	158
Available-for-sale, gross unrealized losses	(720)	(727)
Investment securities available-for-sale, at fair value	11,009	11,280
Held-to-maturity, amortized cost	462	471
Held-to-maturity, gross unrealized losses	(36)	(34)
Held-to-maturity, estimated fair value	426	437
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	1,610	1,621
Available-for-sale, gross unrealized losses	(65)	(63)
Investment securities available-for-sale, at fair value	1,545	1,558
Held-to-maturity, amortized cost	53	58
Held-to-maturity, gross unrealized losses	(6)	(7)
Held-to-maturity, estimated fair value	47	51
Corporate Notes [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	17,752	17,757
Available-for-sale, gross unrealized losses	(2,909)	(2,800)
Investment securities available-for-sale, at fair value	14,843	14,957
US Treasury Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	44,009	56,999
Available-for-sale, gross unrealized losses	(2,858)	(2,997)
Investment securities available-for-sale, at fair value	$ 41,151	$ 54,002