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Net Income per Common Share
 6 Months Ended
Jun. 30, 2011
Net Income per Common Share [Abstract]  
Net Income per Common Share
2. Net Income per Common Share
Net income per common share is computed based on the weighted average number of common shares outstanding during the period. Diluted net income per common share is computed similarly but includes the effect of the assumed exercise of dilutive stock options and restricted stock under the treasury stock method.
The computation of basic and diluted net income per common share is as follows:
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
 
                               
Net income
  $ 2,841,891     $ 441,303     $ 5,111,242     $ 304,361  
 
                               
Weighted average common shares outstanding
    6,906,714       6,817,365       6,899,496       6,808,542  
Effect of dilutive securities:
                               
Stock options
    292,592       121,010       265,492       196,345  
Restricted stock
    133,841       140,584       121,983       127,289  
 
                       
Weighted average common and potentially issuable common shares outstanding — diluted
    7,333,147       7,078,959       7,286,971       7,132,176  
 
                       
 
                               
Basic net income per common share
  $ 0.41     $ 0.06     $ 0.74     $ 0.04  
Diluted net income per common share
  $ 0.39     $ 0.06     $ 0.70     $ 0.04  
At June 30, 2011 there were no unexercised stock options for inclusion in diluted earnings per share. At June 30, 2010 there were 25,000 unexercised stock options that were not included in diluted earnings per share, as they were anti-dilutive.