Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Net income					$ 2,100
Other comprehensive loss					$ (169)
Balance (in shares) at Dec. 31, 2017	84,859				3,217,716
Balance at Dec. 31, 2017		$ 47,431	$ 1,091	$ (13,518)	$ 119,863
Change in accounting principle, ASC 2016-01		141	(141)
Change in accounting principle, ASC 2018-02		(187)	187
Net income		2,605			2,605
Other comprehensive loss			(1,510)		(1,510)
Dividend reinvestment and purchase plan, shares (in shares)	161	3,278
Dividend reinvestment and purchase plan (3,278 shares)					161
Stock-based compensation expense (1,990 shares) (in shares)	96	1,990
Stock-based compensation expense (1,990 shares)					96
Cash dividends ($0.33 per share)		(1,063)			$ (1,063)
Balance (in shares) at Mar. 31, 2018	85,116				3,222,984
Balance at Mar. 31, 2018		$ 48,927	$ (373)	$ (13,518)	$ 120,152