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Investment Securities - Schedule of Amortized Cost and Estimated Fair Value of Investment Securities Available-for-Sale by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	$ 23,791	$ 3,806
Investment securities available-for-sale, Estimated Fair Value	24,005	3,818
U.S. Government Sponsored Enterprises
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, within 1 year, Amortized Cost		501
Investment securities available-for-sale, Greater than 10 years, Amortized Cost	11,870
Investment securities available-for-sale, Amortized Cost	11,870	501
Investment securities available-for-sale, within 1 year, Estimated Fair Value		500
Investment securities available-for-sale, Greater than10 years, Estimated Fair Value	11,859
Investment securities available-for-sale, Estimated Fair Value	11,859	500
Trust Preferred Securities
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Greater than 5 to 10 years, Amortized Cost	2,215
Investment securities available-for-sale, Greater than 10 years, Amortized Cost	500
Investment securities available-for-sale, Amortized Cost	2,715
Investment securities available-for-sale, Greater than 5 to 10 years, Estimated Fair Value	2,189
Investment securities available-for-sale, Greater than10 years, Estimated Fair Value	425
Investment securities available-for-sale, Estimated Fair Value	2,614
Government Agency Mortgage-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Investment securities available-for-sale, Amortized Cost	9,206	3,305
Investment securities available-for-sale, Estimated Fair Value	$ 9,532	$ 3,318

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Amortized cost of 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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