Earnings per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings per common share - basic
Net income	$ 1,041	$ 930	$ 1,997	$ 1,732
Average common shares outstanding (in shares)	2,164,747	2,146,160	2,158,587	2,145,484
Basic earnings per common share (in dollars per share)	$ 0.48	$ 0.43	$ 0.93	$ 0.81
Earnings per common share - diluted
Net income	$ 1,041	$ 930	$ 1,997	$ 1,732
Average common shares outstanding (in shares)	2,164,747	2,146,160	2,158,587	2,145,484
Add: Dilutive effects of assumed issuance of restricted stock and exercise of stock options (in shares)	18,014	10,218	16,936	9,224
Average shares and dilutive potential common shares (in shares)	2,182,761	2,156,378	2,175,523	2,154,708
Diluted earnings per common share (in dollars per share)	$ 0.48	$ 0.43	$ 0.92	$ 0.80
Stock options not considered in computing earnings per share because they were antidilutive (in shares)	0	67,000	0	67,000