Earnings Per Common Share (EPS) (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Shares used in calculation of diluted EPS
Weighted average common shares outstanding	1,983,553	2,018,466	1,983,553	2,018,609
Weighted average common and common equivalent shares outstanding	1,983,553	2,018,466	1,983,553	2,018,609
Stock Options.
Dilutive effect
Based on the Company's net income position, dilutive effect of stock options (in shares)				2,250
Based on the Company's net income position, dilutive effect of stock options, weighted average exercise price (in dollars per share)				$ 8.91
Anti-dilutive securities (in shares)	18,000		18,000
Weighted average exercise price of options, anti-dilutive (in dollars per share)	$ 13.22		$ 13.22
Based on the Company's net income position, anti-dilutive securities (in shares)		18,168		15,918
Based on the Company's net income position, anti-dilutive securities, weighted average exercise price (in dollars per share)		$ 13.81		$ 14.51