Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Preferred stock	Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings	Nonvested restricted stock
Balance at Dec. 31, 2016	$ 109,872	$ 65		$ 73,371	$ (504)	$ 37,540	$ (600)
Balance, shares at Dec. 31, 2016		6,463,789
Net income	3,112					3,112
Proceeds from exercise of stock options	112			112
Proceeds from exercise of stock options, shares		13,250
Issuance of restricted stock				146			(146)
Issuance of restricted stock, shares		3,125
Amortization of deferred compensation on restricted stock	77						77
Compensation expense related to stock options, net of tax	236			236
Other comprehensive income/ loss	157				157
Balance at Mar. 31, 2017	113,566	$ 65		73,865	(347)	40,652	(669)
Balance, shares at Mar. 31, 2017		6,480,164
Balance at Dec. 31, 2017	149,686	$ 73		99,986	(456)	50,585	(502)
Balance, shares at Dec. 31, 2017		7,347,851
Net income	5,214					5,214
Proceeds from exercise of stock options	228	$ 1		227
Proceeds from exercise of stock options, shares		24,365
Issuance of restricted stock				409			(409)
Issuance of restricted stock, shares		9,500
Amortization of deferred compensation on restricted stock	69						69
Compensation expense related to stock options, net of tax	268			268
Other comprehensive income/ loss	(726)				(726)
Balance at Mar. 31, 2018	$ 154,739	$ 74		$ 100,890	$ (1,182)	$ 55,799	$ (842)
Balance, shares at Mar. 31, 2018		7,381,716