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Investment Securities - Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	$ 117,191	$ 83,289
Available-for-sale, gross unrealized gains	1,631	1,855
Available-for-sale, gross unrealized losses	(87)	(151)
Investment securities available-for-sale, at fair value	118,735	84,993
Held-to-maturity, amortized cost	4,848	6,429
Held-to-maturity, gross unrealized gains	95	130
Held-to-maturity, estimated fair value	4,943	6,559
Residential Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	47,269	24,680
Available-for-sale, gross unrealized gains	757	865
Available-for-sale, gross unrealized losses	(4)	(8)
Investment securities available-for-sale, at fair value	48,022	25,537
Commercial Mortgage Backed Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	31,688	40,849
Available-for-sale, gross unrealized gains	652	780
Available-for-sale, gross unrealized losses	(61)	(142)
Investment securities available-for-sale, at fair value	32,279	41,487
Held-to-maturity, amortized cost	2,964	4,302
Held-to-maturity, gross unrealized gains	65	75
Held-to-maturity, estimated fair value	3,029	4,377
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	3,711	4,971
Available-for-sale, gross unrealized gains	117	137
Investment securities available-for-sale, at fair value	3,828	5,108
Held-to-maturity, amortized cost	956	1,007
Held-to-maturity, gross unrealized gains	9	21
Held-to-maturity, estimated fair value	965	1,028
Corporate Notes [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	4,321	2,711
Available-for-sale, gross unrealized gains	34	73
Investment securities available-for-sale, at fair value	4,355	2,784
US Treasury Securities [Member]
Schedule Of Investments [Line Items]
Available-for-sale, amortized cost	30,202	10,078
Available-for-sale, gross unrealized gains	71
Available-for-sale, gross unrealized losses	(22)	(1)
Investment securities available-for-sale, at fair value	30,251	10,077
US Government Agencies Debt Securities [Member]
Schedule Of Investments [Line Items]
Held-to-maturity, amortized cost	928	1,120
Held-to-maturity, gross unrealized gains	21	34
Held-to-maturity, estimated fair value	$ 949	$ 1,154

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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