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8. Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2015
Notes to Financial Statements  
Weighted average assumptions

The following weighted average assumptions were used for grants during the following periods:

 

   Three months ended     Nine months ended 
   September 30,     September 30, 
   2015     2014     2015     2014 
               
Dividend Yield 2.62%   2.97%   2.62%   2.97%
Volatility 34.54%   40.53%   34.54%   40.53%
Risk-Free Interest Rate 1.03%   0.92%   1.03%   0.92%
Expected Life  3.0 years     3.25 years     3.0 years     3.25 years 

Schedule of Stock Options Activity

A summary of stock option activity under the Company’s 2005 and 2014 Plans for the nine months ended September 30, 2015 is as follows:

 

Stock Options Number of Shares    Weighted Average Exercise Price per Share    Weighted Average Remaining Contractual Term    Aggregate Intrinsic Value
               
Outstanding at January 1, 2015       421,250    $               5.16                 3.13    $    1,258,013
               
Granted (1)         50,000    $               6.73        $         95,500
Exercised     (123,750)    $               2.58        $       662,488
Forfeited         (2,500)    $               5.09        
               
Outstanding at September 30, 2015       345,000    $               6.32                 3.60    $       801,075
               
Vested and Exercisable at September 30, 2015       186,875    $               6.22                 3.55    $       451,706