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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of net unrealized gains on equity securities from AOCI per ASU 2016-01 | ASU 2016-01 [Member]	$ 0	$ 0	$ 77	$ (77)	$ 0
Beginning Balance at Dec. 31, 2017	$ 25,087	17,270	54,738	(707)	96,388
Beginning Balance (in shares) at Dec. 31, 2017	5,017,458
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	1,934	0	1,934
Other comprehensive income (loss), net of tax	0	0	0	(1,966)	(1,966)
Issuance of common stock related to acquisition	$ 750	3,207	0	0	3,957
Issuance of common stock related to acquisition (in shares)	149,625
Reclassification of the stranded income tax effects of the Tax Cuts and Jobs Act from AOCI | ASU 2018-02 [Member]	$ 0	0	139	(139)	0
Employee Stock Purchase Plan share issuance	$ 10	38	0	0	48
Employee Stock Purchase Plan share issuance (in shares)	1,940
Stock-based compensation expense	$ 0	53	0	0	53
Cash dividends	0	0	(1,121)	0	(1,121)
Ending Balance at Jun. 30, 2018	$ 25,847	20,568	55,767	(2,889)	$ 99,293
Ending Balance (in shares) at Jun. 30, 2018	5,169,023				5,169,023
Beginning Balance at Mar. 31, 2018	$ 25,093	17,298	55,344	(2,737)	$ 94,998
Beginning Balance (in shares) at Mar. 31, 2018	5,018,539
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	992	0	992
Other comprehensive income (loss), net of tax	0	0	0	(152)	(152)
Issuance of common stock related to acquisition	$ 750	3,207	0	0	3,957
Issuance of common stock related to acquisition (in shares)	149,625
Employee Stock Purchase Plan share issuance	$ 4	18	0	0	22
Employee Stock Purchase Plan share issuance (in shares)	859
Stock-based compensation expense	$ 0	45	0	0	45
Cash dividends	0	0	(569)	0	(569)
Ending Balance at Jun. 30, 2018	$ 25,847	20,568	55,767	(2,889)	$ 99,293
Ending Balance (in shares) at Jun. 30, 2018	5,169,023				5,169,023
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				5,184,289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	0	3,653	0	$ 3,653
Other comprehensive income (loss), 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				5,202,850
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 (loss), 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				5,202,850