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Computation of Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2013
Computation of Earnings Per Share [Abstract]  
Computation of earnings per share
Basic and diluted earnings per share are calculated as follows:

   
For the Three Months Ended
March 31,
 
   
2013
  
2012
 
        
Net income
 $4,052,300  $1,325,000 
          
Weighted average shares outstanding for the period
  1,543,257   1,543,257 
Dilutive effect of warrants
  39,070   7,499 
Weighted average diluted shares used in calculation of diluted earnings per share
  1,582,327   1,550,756 
          
Basic earnings per share
 $2.63  $0.86 
Diluted earnings per share
 $2.56  $0.85