Earnings per Share - Summary of earnings per share computation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic
Net income	$ 2,597	$ 2,985
Weighted average common shares outstanding (in shares)	7,431,540	7,384,223
Basic earnings per share (in dollars per share)	$ 0.35	$ 0.40
Diluted
Weighted average shares outstanding for basic earnings per share	7,431,540	7,384,223
Add: Dilutive effects of share based awards	344,981	356,503
Average shares and dilutive potential common shares	7,776,521	7,740,726
Diluted earnings per share (in dollars per share)	$ 0.33	$ 0.39
Stock options and restricted shares not considered in computing diluted earnings per share because they were anti-dilutive	163,250	163,000