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Share-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Estimated Values of Stock Option Grants Valuation Assumptions

The weighted average estimated values of director and employee stock option grants, as well as the weighted average assumptions that were used in calculating such values during the twelve months ended December 31, 2017 and 2016, were based on estimates at the date of grant as follows:

 

    April 30,     January 1,     February 10,  
    2015 Grant     2016 Grant     2016 Grant  
Risk-free interest rate     1.43 %     1.76 %     1.15 %
Weighted average expected term     5 years       5 years       5 years  
Expected volatility     143.10 %     134.18 %     132.97 %
Expected dividend yield     0.00 %     0.00 %     0.00 %

 

    December 6     March 15,     September 25,  
    2016 Grant     2017 Grant     2017 Grant  
Risk-free interest rate     1.84 %     2.14 %     1.85 %
Weighted average expected term     5 years       5 years       5 years  
Expected volatility     123.82 %     121.19 %     130.79 %
Expected dividend yield     0.00 %     0.00 %     0.00 %

Schedule of Stock Option Activity

A summary of stock option activity during the twelve months ended December 31, 2017 and 2016 under our stock option agreements is as follows:

 

                Weighted-      
          Weighted-     Average      
    Shares     Average     Remaining   Aggregate  
    Under     Exercise     Contractual   Intrinsic  
    Option     Price     Life   Value  
Outstanding at January 1, 2016     768,000     $ 0.75              
Granted     560,000       0.90              
Exercised     -                      
Forfeited and expired     -                      
                             
Outstanding at December 31, 2016     1,328,000     $ 0.81     9 years   $ 115,200  
                             
Exercisable at December 31, 2016     590,500     $ 0.77     8 years   $ 79,200  
                             
Outstanding at January 1, 2017     1,328,000     $ 0.81              
Granted     1,350,000       0.37              
Exercised     -                      
Forfeited and expired     (440,000 )     0.81              
                             
Outstanding at December 31, 2017     2,238,000     $ 0.55     9 years   $ 79,200  
                             
Exercisable at December 31, 2017     849,250     $ 0.70     8 years   $ 79,200