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Investment Securities - Schedule of Investment Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	$ 44,224	$ 23,791
Investment securities available-for-sale, Gross Unrealized Gains	294	327
Investment securities available-for-sale, Gross Unrealized Losses	(447)	(113)
Investment securities available-for-sale, Estimated Fair Value	44,071	24,005
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	4,074
Investment securities available-for-sale, Gross Unrealized Gains	13
Investment securities available-for-sale, Gross Unrealized Losses	(4)
Investment securities available-for-sale, Estimated Fair Value	4,083
Municipal Securities - Tax Exempt
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	541
Investment securities available-for-sale, Gross Unrealized Losses	(8)
Investment securities available-for-sale, Estimated Fair Value	533
Municipal Securities - Taxable
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	797
Investment securities available-for-sale, Gross Unrealized Losses	(8)
Investment securities available-for-sale, Estimated Fair Value	789
Government Agency Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	20,258	9,206
Investment securities available-for-sale, Gross Unrealized Gains	263	326
Investment securities available-for-sale, Gross Unrealized Losses	(186)
Investment securities available-for-sale, Estimated Fair Value	20,335	9,532
U.S. Government Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	11,837	11,870
Investment securities available-for-sale, Gross Unrealized Gains	2	1
Investment securities available-for-sale, Gross Unrealized Losses	(133)	(12)
Investment securities available-for-sale, Estimated Fair Value	11,706	11,859
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	6,717	2,715
Investment securities available-for-sale, Gross Unrealized Gains	16
Investment securities available-for-sale, Gross Unrealized Losses	(108)	(101)
Investment securities available-for-sale, Estimated Fair Value	$ 6,625	$ 2,614

X

- Definition

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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