Shareholders’ Equity and Earnings Per Common Share - Earnings Per Common Share (EPS) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Components of earnings per share calculations
Net income	$ 6,572	$ 13,459	$ 12,530
Weighted average number of common shares used in earnings per common share – basic (in shares)	3,486,510	3,454,282	3,401,426
Effect of dilutive securities:
Stock option awards and warrant	79	1,601	408
Weighted average number of common shares used in earnings per common share – assuming dilution	3,486,589	3,455,883	3,401,834