Earnings Per Share and Capital Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Computation of basic earnings per common share
Net income	$ 1,945	$ 1,972	$ 5,378	$ 6,811
Weighted average common shares outstanding	4,351,801	4,338,498	4,341,858	4,367,035
Net effect of dilutive common share equivalents	7,894	6,344	7,279	6,163
Adjusted average shares outstanding-dilutive	4,359,695	4,344,842	4,349,137	4,373,198
Basic earnings per share	$ 0.45	$ 0.46	$ 1.24	$ 1.56
Diluted earnings per share	$ 0.45	$ 0.46	$ 1.24	$ 1.56