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Investment Securities - Schedule of Investment Securities Available-for-Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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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

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- 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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