Annual report pursuant to Section 13 and 15(d)

Note 12 - Share-based Compensation (Tables)

v3.23.1
Note 12 - Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   

December 31, 2022

   

December 31, 2021

 

Research and development

  $ 460     $ 463  

General and administrative

    1,042       1,095  

Total share-based compensation

  $ 1,502     $ 1,558  
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
   

Shares

Underlying

Options

   

Weighted

Average Exercise

Price Per Share

   

Aggregate

Intrinsic Value

 

Balances as of December 31, 2020

    1,389,564     $ 5.24     $ 7,109  

Granted

    638,008       5.18          

Exercised

    (40,000 )     6.10          

Expired/cancelled

    (20,972 )     12.65          

Forfeited

    (70,000 )     4.24          

Balances as of December 31, 2021

    1,896,600     $ 5.25     $ 169  

Granted

    1,014,398       2.58          

Exercised

                   

Expired/cancelled

    (68,437 )     4.25          

Forfeited

    (60,313 )     11.05          

Balances as of December 31, 2022

    2,782,248     $ 4.12     $ 17  
   

Shares

Underlying

Options

   

Weighted

Grant Date Fair

Value Per Share

 

Unvested as of December 31, 2021

    611,724     $ 3.21  

Granted

    1,014,398       2.04  

Vested

    (316,548 )     3.01  

Forfeited

    (68,437 )     3.14  

Unvested as of December 31, 2022

    1,241,137     $ 2.31  
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

    177,000       9.7     $ 1.50              
$2.00 -

$2.99

    790,398       8.1       2.51       208,699       5.1  
$3.00 -

$3.99

    409,393       7.3       3.81       196,266       5.5  
$4.00 -

$4.99

    862,182       6.5       4.58       820,683       6.5  
$5.00 -

$16.00

    543,275       7.2       6.79       315,463       6.2  
          2,782,248       7.4     $ 4.12       1,541,111       6.1  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

2022

 

2021

 
Common share fair value     $1.47 $3.88     $3.64 $10.04  

Risk-free interest rate

    1.4 3.6%     0.5 1.3%  

Expected dividend yield

      0 %       0 %  

Expected option life (years)

    5.0 5.6     5.0 5.5  

Expected stock price volatility

    102.1 104.0%     94.7 106.1%