Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Share-based Compensation (Tables)

v3.23.3
Note 12 - Share-based Compensation (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   

Three Months Ended

September 30

   

Nine Months Ended

September 30

 
   

2023

   

2022

   

2023

   

2022

 

Research and development

  $ 158     $ 126     $ 430     $ 325  

General and administrative

    267       292       797       766  

Total share-based compensation

  $ 425     $ 418     $ 1,227     $ 1,091  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
   

Shares

Underlying

Options

Outstanding

   

Weighted

Average Exercise

Price Per Share

   

Aggregate

Intrinsic Value

 

Balances at December 31, 2022

    2,782,248     $ 4.12     $ 17  

Granted

    972,515       2.59          

Expired/cancelled

    (47,500 )     7.35          

Forfeited

    (8,750 )     10.04          

Balances at September 30, 2023

    3,698,513     $ 3.66     $ 462  
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
       

Outstanding, Vested and Expected to Vest

   

Options Vested and Exercisable

 

Per Share Exercise

Price

 

Shares

   

Weighted Average

Remaining

Contractual Life

(Years)

   

Weighted Average

Exercise Price

   

Options

Exercisable

   

Weighted Average

Remaining

Contractual Life

(Years)

 
$1.00 -

$1.99

    343,443       9.2     $ 1.55       51,407       9.1  
$2.00 -

$2.99

    1,506,470       8.4       2.62       513,200       6.7  
$3.00 -

$3.99

    474,393       7.2       3.70       266,966       5.8  
$4.00 -

$4.99

    862,182       5.8       4.58       854,265       5.8  
$5.00 -

$16.00

    512,025       6.7       6.53       354,525       6.2  
          3,698,513       7.5     $ 3.66       2,040,363       6.1