Earnings Per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 2,684,000	$ 2,835,000
Basic earnings (loss) per share
Weighted average shares outstanding	5,042,000	4,934,000
Basic earnings per share (in dollars per share)	$ 0.53	$ 0.57
Diluted earnings (loss) per share
Weighted average shares outstanding	5,042,000	4,934,000
Dilutive effect of stock options	37,000	132,000
Total weighted average shares outstanding	5,079,000	5,066,000
Diluted earnings per share (in dollars per share)	$ 0.53	$ 0.56
Income tax expense	$ 1,057,000	$ 1,462,000