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Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Summary of Fair Value of Options Using Black-Sholes Option Pricing Model

The fair value of the options issued ($237,850, in the aggregate) was calculated using the Black-Sholes option pricing model, based on the criteria shown below.

 

Expected life (in years)     5.5 to 8  
Volatility (based on a comparable company)     59.82% to 77.19 %
Risk Free interest rate     1.79% to 2.78 %
Dividend yield (on common stock)     -  

 

The fair value of the options issued ($217,650, in the aggregate) was calculated using the Black-Sholes option pricing model, based on the criteria shown below.

 

Expected life (in years)     5.5 to 8  
Volatility (based on a comparable company)     73.36%-75.82 %
Risk Free interest rate     0.30%-1.61 %
Dividend yield (on common stock)     -  
Summary of Outstanding Stock Options Issued to Employees and Directors

The following is a summary of outstanding stock options issued to employees and directors as of December 31, 2020:

 

    Number of Options     Exercise
price per
share $
    Average
remaining
term in years
    Aggregate
intrinsic
value at date
of grant $
 
Outstanding January 1, 2019     7,428,014       .40 - .87       5.48          
Issued     1,156,343       .45 - .73                  
Cancelled     (1,387,333 )                        
Outstanding December 31, 2019     7,197,024       .40 - .87       4.55       -  
Issued     1,069,358       .34 - .44                  
Cancelled/Expired     (625,423 )                        
Outstanding December 31, 2020     7,640,959       .34 - .87       3.48          
                                 
Exercisable, December 31 2020     6,667,625       .34 - .87       3.48       -