CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock	Paid-in capital	Retained earnings	Unearned compensation restricted stock awards	Accumulated other comprehensive income	Total
Balance - Beginning, amount at Dec. 31, 2016	$ 276	$ 42,085	$ 51,521	$ (352)	$ 477	$ 94,007
Balance - Beginning, shares at Dec. 31, 2016	2,758,086
Net income			3,487			3,487
Other comprehensive loss, net of tax					90	90
Common stock dividends declared			(1,555)			(1,555)
Stock options exercised, amount	$ 1	312				$ 313
Stock options exercised, shares	12,150					12,150
Issuance of restricted stock awards, amount	$ 2	426		(428)
Issuance of restricted stock awards, shares	10,950
Forfeiture of restricted stock, amount		(3)		3
Forfeiture of restricted stock, shares	(200)
Issuance of vested common stock for directors, amount		81				81
Issuance of vested common stock for directors, shares	2,056
Issuance of director's restricted stock awards, amount		83		(83)
Issuance of director's restricted stock awards, shares	2,024
Stock based compensation - restricted stock awards				122		122
Balance - Ending, amount at Jun. 30, 2017	$ 279	42,984	53,453	(738)	567	96,545
Balance - Ending, shares at Jun. 30, 2017	2,785,066
Balance - Beginning, amount at Dec. 31, 2017	$ 279	42,998	54,664	(606)	179	$ 97,514
Balance - Beginning, shares at Dec. 31, 2017	2,785,216					2,785,216
Net income			3,915			$ 3,915
Adoption of new accounting principle			(16)		16
Other comprehensive loss, net of tax					(1,041)	(1,041)
Common stock dividends declared			(1,561)			(1,561)
Stock options exercised, amount	$ 1	144				$ 145
Stock options exercised, shares	4,700					3,350
Issuance of restricted stock awards, amount		410		(410)
Issuance of restricted stock awards, shares	9,250
Issuance of director's restricted stock awards, amount		175		(175)
Issuance of director's restricted stock awards, shares	3,960
Stock based compensation - restricted stock awards				208		208
Balance - Ending, amount at Jun. 30, 2018	$ 280	$ 43,727	$ 57,002	$ (983)	$ (846)	$ 99,180
Balance - Ending, shares at Jun. 30, 2018	2,803,126					2,803,126