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10. Net Income Per Common Share (Tables)
6 Months Ended
Jun. 30, 2015
Earnings per common share:  
Schedule of Net Income Per Common Share
   Three months ended    Six months ended
   June 30,    June 30,
   2015    2014    2015    2014
               
 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