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 Loss [Member]	Total
Increase (Decrease) in Stockholders' Equity [Roll Forward]
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
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	942	0	942
Other comprehensive income (loss), net of tax	0	0	0	(1,814)	(1,814)
Employee Stock Purchase Plan share issuance	$ 6	20	0	0	26
Employee Stock Purchase Plan share issuance (in shares)	1,081
Stock-based compensation expense	$ 0	8	0	0	8
Cash dividends	0	0	(552)	0	(552)
Ending Balance at Mar. 31, 2018	$ 25,093	17,298	55,344	(2,737)	94,998
Ending Balance (in shares) at Mar. 31, 2018	5,018,539
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	2,027	0	$ 2,027
Other comprehensive income (loss), net of tax	0	0	0	1,540	1,540
Employee Stock Purchase Plan share issuance	$ 4	15	0	0	19
Employee Stock Purchase Plan share issuance (in shares)	862
Stock-based compensation expense	$ 0	50	0	0	50
Cash dividends	0	0	(623)	0	(623)
Ending Balance at Mar. 31, 2019	$ 25,857	$ 20,763	$ 59,015	$ (616)	$ 105,019
Ending Balance (in shares) at Mar. 31, 2019	5,171,462				5,201,812