Net Income per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic:
Net income available for common stockholders	$ 846	$ 386
Weighted-average shares outstanding	15,219	15,294
Basic earnings per share	$ 0.06	$ 0.03
Diluted:
Net income available for common stockholders	$ 846	$ 386
Weighted-average shares outstanding	15,219	15,294
Common stock equivalents, if diluted	429	432
Shares used in computing diluted earnings per common share	15,648	15,726
Diluted earnings per share	$ 0.05	$ 0.02
Shares excluded in computing diluted earnings per share as those shares would be anti-dilutive	505	571