Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]
Balance at Dec. 31, 2018	$ 104,348	$ 2,280	$ 20,041	$ 91,635	$ (7,132)	$ (2,476)
Balance (in shares) at Dec. 31, 2018		3,484,080
Net income	3,379			3,379
Other comprehensive income (loss), net of tax	3,500				3,500
Cash dividends declared	(1,151)			(1,151)
Stock issued in connection with dividend reinvestment and stock purchase plan	235	$ 4	231
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		6,646
Stock issued for options exercised	$ 22	$ 2	20
Stock issued for options exercised (in shares)	8,275	3,209
Stock-based compensation expense	$ 27		27
Balance at Mar. 31, 2019	110,360	$ 2,286	20,319	93,863	(3,632)	(2,476)
Balance (in shares) at Mar. 31, 2019		3,493,935
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	3,519,767
Net income	$ 220			220
Other comprehensive income (loss), net of tax	4,591				4,591
Cash dividends declared	(1,197)			(1,197)
Stock issued in connection with dividend reinvestment and stock purchase plan	220	$ 4	216
Stock issued in connection with dividend reinvestment and stock purchase plan (in shares)		7,782
Stock issued for options exercised	$ 37	$ 2	35
Stock issued for options exercised (in shares)	9,550	3,121
Stock-based compensation expense	$ 25		25
Balance at Mar. 31, 2020	$ 124,613	$ 2,309	$ 21,537	$ 98,395	$ 4,848	$ (2,476)
Balance (in shares) at Mar. 31, 2020	3,530,670	3,530,670