Loans and Allowance for Credit Losses - Schedule of Categories of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Fair Value Measurements
Total gross loans	$ 495,734		$ 491,559
Less allowance for credit losses	(4,356)	$ (4,250)	(4,261)	$ (4,156)	$ (4,095)	$ (4,026)
Total loans	491,378		487,298
Commercial and industrial loans
Fair Value Measurements
Total gross loans	85,898		92,019
Less allowance for credit losses	(518)	(555)	(544)	(531)	(597)	(557)
Commercial real estate
Fair Value Measurements
Total gross loans	316,698		303,048
Less allowance for credit losses	(2,868)	(2,696)	(2,571)	(2,225)	(2,101)	(2,115)
Commercial real estate - secured by residential mortgages
Fair Value Measurements
Total gross loans	61,815		62,963
Commercial real estate - other
Fair Value Measurements
Total gross loans	254,883		240,085
Residential real estate
Fair Value Measurements
Total gross loans	87,016		89,580
Less allowance for credit losses	(840)	(877)	(1,034)	(1,287)	(1,253)	(1,223)
Consumer loans
Fair Value Measurements
Total gross loans	6,122		6,912
Less allowance for credit losses	$ (130)	$ (122)	$ (112)	$ (113)	$ (144)	$ (131)