10. Net Income Per Common Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income Per Common Share Details
Weighted average number of shares outstanding	7,334,269	7,294,913	7,330,178	7,283,244
Effect of dilutive securities, common share equivalents	$ 47,357	$ 83,184	$ 37,536	$ 77,050
Weighted average number of shares outstanding, used for computing diluted earnings per share	7,381,626	7,378,097	7,367,714	7,360,294