Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2019	$ 120,717	$ 2,303	$ 21,261	$ 99,372	$ 257	$ (2,476)
Balance (in shares) at Dec. 31, 2019		3,519,767
Net income	12,083			12,083
Other comprehensive loss, net of tax	5,392				5,392
Cash dividends declared	(4,811)			(4,811)
Treasury stock purchase	(130)					(130)
Treasury stock purchase (in shares)		(4,100)
Stock issued in connection with dividend reinvestment and stock purchase plan	898	$ 19	879
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		32,022
Stock issued for employee stock purchase plan	$ 147	$ 4	143
Stock issued for employee stock purchase plan (in shares)	5,723	5,723
Stock issued for options exercised	$ 37	$ 2	35
Stock issued for options exercised (in shares)	9,550	3,121
Stock-based compensation expense	$ 112		112
Balance at Dec. 31, 2020	134,445	$ 2,328	22,430	106,644	5,649	(2,606)
Balance (in shares) at Dec. 31, 2020		3,556,533
Net income	16,492			16,492
Other comprehensive loss, net of tax	(9,389)				(9,389)
Cash dividends declared	(4,973)			(4,973)
Treasury stock purchase	(1,356)					(1,356)
Treasury stock purchase (in shares)		(38,017)
Stock issued in connection with dividend reinvestment and stock purchase plan	841	$ 15	826
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		23,690
Stock issued for employee stock purchase plan	$ 145	$ 3	142
Stock issued for employee stock purchase plan (in shares)	4,906	4,906
Stock issued for options exercised	$ 187	$ 4	183
Stock issued for options exercised (in shares)	19,025	6,517
Stock-based compensation expense	$ 102		102
Balance at Dec. 31, 2021	$ 136,494	$ 2,350	23,683	118,163	(3,740)	(3,962)
Balance (in shares) at Dec. 31, 2021	3,553,629	3,553,629
Net income	$ 15,921			15,921
Other comprehensive loss, net of tax	(77,387)				(77,387)
Cash dividends declared	(5,133)			(5,133)
Treasury stock purchase	(75)					(75)
Treasury stock purchase (in shares)		(2,000)
Stock issued in connection with dividend reinvestment and stock purchase plan	917	$ 20	897
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		31,531
Stock issued for employee stock purchase plan	$ 136	$ 3	133
Stock issued for employee stock purchase plan (in shares)	5,102	5,102
Stock-based compensation expense	$ 85		85
Balance at Dec. 31, 2022	$ 70,958	$ 2,373	$ 24,798	$ 128,951	$ (81,127)	$ (4,037)
Balance (in shares) at Dec. 31, 2022	3,588,262	3,588,262