Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Surplus	Retained Earnings Impact of adopting ASC 326	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Impact of adopting ASC 326	Total
Beginning balance at Dec. 31, 2022	$ 5,151	$ 24,986		$ 49,961	$ (41,867)	$ (2,538)		$ 35,693
Beginning balance, shares at Dec. 31, 2022	5,003,059
Net income				3,131				3,131
Other comprehensive income					(146)			(146)
Cash dividends				(2,203)				(2,203)
Stock-based compensation		71						71
Purchase of treasury stock						(9)		(9)
Purchase of treasury stock, shares	(569)
Treasury stock issued for stock plans		(205)				267		62
Treasury stock issued for stock plans, shares	15,639
Ending balance at Jun. 30, 2023	$ 5,151	24,852	$ (854)	50,035	(42,013)	(2,280)	$ (854)	35,745
Ending balance, shares at Jun. 30, 2023	5,018,129
Beginning balance at Mar. 31, 2023	$ 5,151	24,823		49,739	(41,088)	(2,352)		36,273
Beginning balance, shares at Mar. 31, 2023	5,013,899
Net income				1,398				1,398
Other comprehensive income					(925)			(925)
Cash dividends				(1,102)				(1,102)
Stock-based compensation		39						39
Treasury stock issued for stock plans		(10)				72		62
Treasury stock issued for stock plans, shares	4,230
Ending balance at Jun. 30, 2023	$ 5,151	24,852	$ (854)	50,035	(42,013)	(2,280)	$ (854)	35,745
Ending balance, shares at Jun. 30, 2023	5,018,129
Beginning balance at Dec. 31, 2023	$ 5,151	24,924		51,297	(38,640)	(2,595)		$ 40,137
Beginning balance, shares at Dec. 31, 2023	4,991,129							4,991,129
Net income				3,101				$ 3,101
Other comprehensive income					2,197			2,197
Cash dividends				(2,197)				(2,197)
Stock-based compensation		70						70
Purchase of treasury stock						(3)		(3)
Purchase of treasury stock, shares	(239)
Treasury stock issued for stock plans		(170)				202		32
Treasury stock issued for stock plans, shares	12,494
Ending balance at Jun. 30, 2024	$ 5,151	24,824		52,201	(36,443)	(2,396)		$ 43,337
Ending balance, shares at Jun. 30, 2024	5,003,384							5,003,384
Beginning balance at Mar. 31, 2024	$ 5,151	24,802		51,554	(37,583)	(2,442)		$ 41,482
Beginning balance, shares at Mar. 31, 2024	5,000,518
Net income				1,746				1,746
Other comprehensive income					1,140			1,140
Cash dividends				(1,099)				(1,099)
Stock-based compensation		36						36
Treasury stock issued for stock plans		(14)				46		32
Treasury stock issued for stock plans, shares	2,866
Ending balance at Jun. 30, 2024	$ 5,151	$ 24,824		$ 52,201	$ (36,443)	$ (2,396)		$ 43,337
Ending balance, shares at Jun. 30, 2024	5,003,384							5,003,384