Investment Securities - Amortized Cost and Fair Value - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Securities Available-for-Sale
Total amortized cost, available for sale	$ 146,976	$ 132,923
Gross unrealized gains		145
Gross unrealized (losses)	(13,569)	(9,216)
Available-for-sale, fair value	133,407	123,852
Past Due
Securities Available-for-Sale
Available-for-sale, fair value	0	0
U.S. Treasuries
Securities Available-for-Sale
Total amortized cost, available for sale	2,000	13,244
Gross unrealized (losses)	(22)	(112)
Available-for-sale, fair value	1,978	13,132
U.S. government and federal agencies
Securities Available-for-Sale
Total amortized cost, available for sale	4,997	6,976
Gross unrealized gains		2
Gross unrealized (losses)	(262)	(158)
Available-for-sale, fair value	4,735	6,820
Corporate bonds
Securities Available-for-Sale
Total amortized cost, available for sale	2,000	3,000
Gross unrealized (losses)	(84)	(180)
Available-for-sale, fair value	1,916	2,820
U.S. agency collateralized mortgage obligations
Securities Available-for-Sale
Total amortized cost, available for sale	27,590	31,019
Gross unrealized gains		7
Gross unrealized (losses)	(6,339)	(5,333)
Available-for-sale, fair value	21,251	25,693
Tax-exempt municipal
Securities Available-for-Sale
Total amortized cost, available for sale	1,377	1,378
Gross unrealized (losses)	(261)	(142)
Available-for-sale, fair value	1,116	1,236
U.S. agency mortgage-backed
Securities Available-for-Sale
Total amortized cost, available for sale	109,012	77,306
Gross unrealized gains		136
Gross unrealized (losses)	(6,601)	(3,291)
Available-for-sale, fair value	$ 102,411	$ 74,151

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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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
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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).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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