Annual report pursuant to Section 13 and 15(d)

Note 12 - Share-based Compensation - Stock Option Activity (Details)

v3.24.1
Note 12 - Share-based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Unvested (in shares) 1,241,137    
Unvested, weighted average grant-date fair value (in dollars per share) $ 2.31    
Granted (in shares) 1,172,515    
Granted, weighted average grant-date fair value (in dollars per share) $ 2.09    
Vested (in shares) (723,968)    
Exercised (in shares)   0  
Vested, weighted average grant-date fair value (in dollars per share) $ 2.38    
Forfeited (in shares) (25,000)    
Forfeited, weighted average grant-date fair value (in dollars per share) $ 2.65    
Unvested (in shares) 1,664,684 1,241,137  
Unvested, weighted average grant-date fair value (in dollars per share) $ 2.11 $ 2.31  
Share-Based Payment Arrangement, Option [Member]      
Balance (in shares) 2,782,248 1,896,600  
Balance, weighted average exercise price (in dollars per share) $ 4.12 $ 5.25  
Balance, aggregate intrinsic value $ 832 $ 17 $ 169
Granted (in shares) 1,172,515 1,014,398  
Granted, weighted average exercise price (in dollars per share) $ 2.59 $ 2.58  
Exercised (in shares) 0 0  
Exercised, weighted average exercise price (in dollars per share) $ 0 $ 0  
Expired/cancelled (in shares) (58,750) (68,437)  
Expired / cancelled, weighted average exercise price (in dollars per share) $ 8.08 $ 4.25  
Forfeited (in shares) (25,000) (60,313)  
Forfeited, weighted average exercise price (in dollars per share) $ 3.24 $ 11.05  
Balance (in shares) 3,871,013 2,782,248  
Balance, weighted average exercise price (in dollars per share) $ 3.61 $ 4.12