10. Net Income Per Common Share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income Per Common Share Details
Weighted average number of shares outstanding	7,337,817	7,287,935	7,328,098	7,277,313
Effect of dilutive securities, common share equivalents	$ 25,171	$ 70,345	$ 27,810	$ 75,296
Weighted average number of shares outstanding, used for computing diluted earnings per share	7,362,988	7,358,280	7,355,908	7,352,609