Common Stock and Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]
Net income	$ 2,594	$ 2,581
Shares Used in Computing Basic and Diluted Net Income per Share [Abstract]
Weighted average common shares, basic (in shares)	12,876,514	12,851,505
Effect of dilutive securities [Abstract]
Employee stock-based compensation (in shares)	110	18
Weighted average common shares, diluted (in shares)	12,876,624	12,851,523
Stock Repurchase Program [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)			1,200,000
Number of shares repurchased under the stock repurchase program (in shares)	0	24,329
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	618,004