XML 46 R28.htm IDEA: XBRL DOCUMENT v3.20.1
Stock Options (Tables)
3 Months Ended
Mar. 31, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of information about stock options

   Number of
options
   Weighted
average
exercise
price
   Weighted
average
contractual
term
(years)
   Aggregate
intrinsic
value
 
Outstanding at January 1, 2020   2,004,318   $1.72           
Granted   425,000    2.53           
Forfeited   (9,500)   1.17         4,453 
Expired   -                
Outstanding at March 31, 2020   2,419,818   $1.86    8.05   $539,949 
Vested and exercisable at March 31, 2020   853,485   $2.49    7.77   $226,328 
                     
Outstanding at January 1, 2019   620,900   $3.75           
Granted   29,000    0.87           
Forfeited   (19,500)   1.27        $788 
Expired   (25,000)   6.20        $  
Outstanding at March 31, 2019   605,400   $3.59    7.92    4,408 
Vested and exercisable at March 31, 2019   304,900   $3.59    6.58      

Schedule of option input into a Black Scholes option pricing model
   Three Months ended 
   March 31, 
   2020   2019 
Exercise price  $2.53   $0.87 
Expected life   5.1 years    5.5 years 
Expected volatility   64%   38%
Dividend yield   0%   0%
Risk-free interest rate   1.69%   2.50%