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Earnings per share
 6 Months Ended
Jun. 30, 2016
Earnings Per Share [Abstract]  
Earnings per share
Earnings per share
 
The following is a summary of the basic and diluted earnings per share for the three and six month periods ended June 30, 2016 and June 30, 2015.
 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
 
2016
 
2015
 
2016
 
2015
Net income available to common shareholders
 
$
921,630

 
$
36,102

 
$
2,058,493

 
$
344,494

Weighted average common shares outstanding
 
5,820,342

 
2,965,783

 
5,813,915

 
2,965,783

Effect of dilutive stock options
 
311,478

 
327,496

 
304,615

 
327,516

Diluted shares
 
6,131,820

 
3,293,279

 
6,118,530

 
3,293,299

Basic earnings per common share
 
$
0.16

 
$
0.01

 
$
0.35

 
$
0.12

Diluted earnings per common share
 
$
0.15

 
$
0.01

 
$
0.34

 
$
0.10


 
For the three and six months ended June 30, 2016 and 2015, the effects of outstanding antidilutive stock options are excluded from the computation of diluted earnings per common share because the exercise price of such options is higher than the market price. There are 18,100 and 0 antidilutive stock options as of June 30, 2016 and 2015, respectively.