Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Computation of basic earnings per common share
Net income	$ 8,835	$ 4,350	$ 4,871
Weighted average common shares outstanding	4,357,760	4,407,254	4,406,005
Net effect of dilutive common share equivalents	6,474	4,220	1,264
Adjusted average shares outstanding - dilutive	4,364,234	4,411,474	4,407,269
Basic earnings per share	$ 2.03	$ 0.99	$ 1.11
Dilutive earnings per share	$ 2.03	$ 0.99	$ 1.11