Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock-based Compensation (Tables)

v3.21.1
Note 4 - Stock-based Compensation (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Share-based Payment Arrangement, Option, Activity [Table Text Block]
   
Three Months Ended March 31, 2021
 
   
Number of
Options
   
Weighted
Average
Exercise
Price
   
Weighted
Average
Remaining
Contractual
Life (years)
   
Aggregate
Intrinsic
Value
 
Outstanding, January 1, 2021
   
549,970
    $
8.81
     
8.0
    $
209,280
 
Granted
   
229,500
     
2.54
     
 
     
 
 
Outstanding, March 31, 2021
   
779,470
    $
6.97
     
8.4
    $
184,320
 
Exercisable, March 31, 2021
   
201,438
    $
15.21
     
6.4
    $
67,841
 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
   
Three Months Ended
March 31, 2021
 
   
Number of
Shares
   
Weighted
Average
Grant-Date
Fair Value
 
Unvested, January 1, 2021
   
60,000
    $
2.90
 
Granted
   
12,500
     
2.28
 
Vested
   
(10,000
)
   
1.06
 
Unvested, March 31, 2021
   
62,500
    $
3.07