Investment Securities - Amortized cost to fair value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	$ 221,678	$ 204,269
Unrealized gain	17	37
Unrealized loss	(14,526)	(14,841)
Fair Value	207,169	189,465
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	17	37
Unrealized loss	(14,526)	(14,841)
Federal Home Loan Bank Advances [Member] \| Asset Pledged as Collateral [Member]
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Fair Value	50,900	49,600
U.S. Treasury securities
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	79,796	66,874
Unrealized gain	1	27
Unrealized loss	(2,375)	(2,549)
Fair Value	77,422	64,352
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	1	27
Unrealized loss	(2,375)	(2,549)
U.S. Government agencies
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	3,998
Unrealized gain	1
Fair Value	3,999
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	1
Agency mortgage-backed securities
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	12,792	13,154
Unrealized gain	3	5
Unrealized loss	(1,870)	(1,729)
Fair Value	10,925	11,430
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	3	5
Unrealized loss	(1,870)	(1,729)
Agency collateralized mortgage obligations
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	2,849	2,987
Unrealized gain	1
Unrealized loss	(590)	(569)
Fair Value	2,260	2,418
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	1
Unrealized loss	(590)	(569)
Corporate bonds
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	103,235	101,244
Unrealized gain	11	5
Unrealized loss	(8,760)	(9,014)
Fair Value	94,486	92,235
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized gain	11	5
Unrealized loss	(8,760)	(9,014)
Municipal obligations
Amortized cost and estimated fair values of securities classified as Available-for-Sale
Amortized Cost	19,008	20,010
Unrealized loss	(931)	(980)
Fair Value	18,077	19,030
Amortized cost and estimated fair values of securities classified as Available-for-Sale (Prior to ASU adoption)
Unrealized loss	$ (931)	$ (980)

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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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://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

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Amortized cost excluding accrued interest, before allowance for credit loss, 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
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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Amount excluding accrued interest, 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/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

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