Annual report pursuant to Section 13 and 15(d)

Note 11 - Stock Options and Warrants (Tables)

v3.21.1
Note 11 - Stock Options and Warrants (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
2020
   
2019
 
Risk-free interest rate
   
0.26%
-
0.39%
     
2.31
%
Dividend yield
   
 
0%
 
     
0
%
Expected term (in years)
   
 
5
 
     
5
 
Expected volatility
   
65.8%
-
90.3%
     
57.9
%
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Options outstanding
           
           
Weighted average
 
Weighted average
 
Aggregate
 
           
exercise price
 
remaining
 
intrinsic
 
Incentive options
 
Shares
   
per share
 
contractual term
 
value
 
Outstanding at December 31, 2018
   
1,376,500
    $
0.23
 
 
   
 
 
Options granted
   
3,000
     
0.21
 
 
   
 
 
Options exercised
   
(10,000
)    
0.10
 
 
   
 
 
Options expired
   
(15,500
)    
0.10
 
 
   
 
 
Options forfeited
   
(5,000
)    
0.46
 
 
   
 
 
Outstanding at December 31, 2019
   
1,349,000
    $
0.23
 
3 years, 11 months
  $
-
 
Options granted
   
235,000
     
0.64
 
 
   
 
 
Options exercised
   
(50,000
)    
0.20
 
 
   
 
 
Options expired
   
(99,000
)    
0.18
 
 
   
 
 
Options forfeited
   
(40,000
)    
0.16
 
 
   
 
 
Outstanding at December 31, 2020
   
1,395,000
    $
0.31
 
4 years, 5 months
  $
1,591,223
 
                           
Exercisable at December 31, 2019
   
1,325,500
    $
0.23
 
3 years, 10 months
  $
-
 
Exercisable at December 31, 2020
   
1,160,000
    $
0.24
 
3 years, 4 months
  $
1,400,423
 
Schedule of Nonvested Share Activity [Table Text Block]
   
Nonvested
 
           
Weighted average
 
           
grant date
 
   
Shares
   
fair value
 
Nonvested at December 31, 2018
   
148,500
    $
0.20
 
Granted
   
3,000
     
0.11
 
Vested
   
(123,000
)    
0.20
 
Forfeited
   
(5,000
)    
0.21
 
Nonvested at December 31, 2019
   
23,500
    $
0.17
 
Granted
   
235,000
     
0.36
 
Vested
   
(23,500
)    
0.17
 
Forfeited
   
-
     
-
 
Nonvested at December 31, 2020
   
235,000
    $
0.36