Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning Balance at Dec. 31, 2018	$ 25,853	$ 20,698	$ 57,611	$ (2,156)	$ 102,006
Beginning Balance (in shares) at Dec. 31, 2018	5,170,600
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	3,653	0	3,653
Other comprehensive income, net of tax	0	0	0	2,835	2,835
Employee Stock Purchase Plan share issuance	$ 10	30	0	0	40
Employee Stock Purchase Plan share issuance (in shares)	1,900
Restricted stock vested	$ 29	(29)	0	0	0
Restricted stock vested (in shares)	5,839
Stock-based compensation expense	$ 0	139	0	0	139
Cash dividends	0	0	(1,248)	0	(1,248)
Ending Balance at Jun. 30, 2019	$ 25,892	20,838	60,016	679	107,425
Ending Balance (in shares) at Jun. 30, 2019	5,178,339
Beginning Balance at Mar. 31, 2019	$ 25,857	20,763	59,015	(616)	105,019
Beginning Balance (in shares) at Mar. 31, 2019	5,171,462
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	1,626	0	1,626
Other comprehensive income, net of tax	0	0	0	1,295	1,295
Employee Stock Purchase Plan share issuance	$ 6	15	0	0	21
Employee Stock Purchase Plan share issuance (in shares)	1,038
Restricted stock vested	$ 29	(29)	0	0	0
Restricted stock vested (in shares)	5,839
Stock-based compensation expense	$ 0	89	0	0	89
Cash dividends	0	0	(625)	0	(625)
Ending Balance at Jun. 30, 2019	$ 25,892	20,838	60,016	679	107,425
Ending Balance (in shares) at Jun. 30, 2019	5,178,339
Beginning Balance at Dec. 31, 2019	$ 25,901	20,959	62,975	(79)	$ 109,756
Beginning Balance (in shares) at Dec. 31, 2019	5,180,105				5,200,038
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	3,744	0	$ 3,744
Other comprehensive income, net of tax	0	0	0	3,431	3,431
Employee Stock Purchase Plan share issuance	$ 13	33	0	0	46
Employee Stock Purchase Plan share issuance (in shares)	2,593
Restricted stock vested	$ 42	(42)	0	0	0
Restricted stock vested (in shares)	8,519
Stock-based compensation expense	$ 0	143	0	0	143
Cash dividends	0	0	(1,251)	0	(1,251)
Ending Balance at Jun. 30, 2020	$ 25,956	21,093	65,468	3,352	$ 115,869
Ending Balance (in shares) at Jun. 30, 2020	5,191,217				5,221,244
Beginning Balance at Mar. 31, 2020	$ 25,941	21,026	63,601	(524)	$ 110,044
Beginning Balance (in shares) at Mar. 31, 2020	5,188,221
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	2,494	0	2,494
Other comprehensive income, net of tax	0	0	0	3,876	3,876
Employee Stock Purchase Plan share issuance	$ 9	16	0	0	25
Employee Stock Purchase Plan share issuance (in shares)	1,735
Restricted stock vested	$ 6	(6)	0	0	0
Restricted stock vested (in shares)	1,261
Stock-based compensation expense	$ 0	57	0	0	57
Cash dividends	0	0	(627)	0	(627)
Ending Balance at Jun. 30, 2020	$ 25,956	$ 21,093	$ 65,468	$ 3,352	$ 115,869
Ending Balance (in shares) at Jun. 30, 2020	5,191,217				5,221,244