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			5,180			5,180
Other comprehensive loss, net of tax					79	79
Common stock dividends declared			(2,333)			(2,333)
Stock options exercised, amount	$ 1	311				$ 312
Stock options exercised, shares	12,150					12,150
Issuance of restricted stock, amount	$ 2	426		(428)
Issuance of restricted stock, shares	11,800
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				200		200
Balance - Ending, amount at Sep. 30, 2017	$ 279	42,983	54,368	(660)	556	97,526
Balance - Ending, shares at Sep. 30, 2017	2,785,916
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			6,259			$ 6,259
Adoption of new accounting principle			(16)		16
Other comprehensive loss, net of tax					(1,169)	(1,169)
Common stock dividends declared			(2,346)			(2,346)
Stock options exercised, amount		175				$ 175
Stock options exercised, shares	6,455					3,350
Issuance of restricted stock, amount	$ 1	409		(410)
Issuance of restricted stock, 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				334		334
Balance - Ending, amount at Sep. 30, 2018	$ 280	$ 43,757	$ 58,561	$ (857)	$ (974)	$ 100,767
Balance - Ending, shares at Sep. 30, 2018	2,804,881					2,804,881