Consolidated Statement of Shareholders' Equity (Unaudited) - 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, 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	$ 5,050			5,050
Other comprehensive income (loss), net of tax	(6,327)				(6,327)
Cash dividends declared	(1,243)			(1,243)
Stock issued in connection with dividend reinvestment and stock purchase plan	$ 207	4	203
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)	6,319
Stock issued for options exercised	$ 131	3	128
Stock issued for options exercised (in shares)	5,017
Stock-based compensation expense	$ 20		20
Treasury stock purchase	$ (287)					(287)
Treasury stock purchase (in shares)	(8,700)
Balance at Mar. 31, 2021	$ 131,996	2,335	22,781	110,451	(678)	(2,893)
Balance (in shares) at Mar. 31, 2021	3,559,169
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
Net income	$ 3,710			3,710
Other comprehensive income (loss), net of tax	(36,601)				(36,601)
Cash dividends declared	(1,279)			(1,279)
Stock issued in connection with dividend reinvestment and stock purchase plan	$ 227	4	223
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)	6,177
Stock-based compensation expense	$ 22		22
Treasury stock purchase	$ (75)					(75)
Treasury stock purchase (in shares)	(2,000)
Balance at Mar. 31, 2022	$ 102,498	$ 2,354	$ 23,928	$ 120,594	$ (40,341)	$ (4,037)
Balance (in shares) at Mar. 31, 2022	3,557,806