Earnings Per Share and Capital Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Computation of basic earnings per common share
Net income	$ 2,105	$ 1,537
Weighted average common shares outstanding	4,326,734	4,393,449
Net effect of dilutive common share equivalents	9,507	8,327
Adjusted average shares outstanding-dilutive	4,336,241	4,401,776
Basic earnings per share	$ 0.49	$ 0.35
Diluted earnings per share	$ 0.49	$ 0.35