Annual report pursuant to Section 13 and 15(d)

Note 12 - Share-based Compensation (Details Textual)

v3.24.1
Note 12 - Share-based Compensation (Details Textual) - USD ($)
$ in Millions
 12 Months Ended
May 18, 2022
Dec. 03, 2021
Dec. 31, 2023
Dec. 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)     1,172,515  
Common Stock, Capital Shares Reserved for Future Issuance (in shares)     5,407,133  
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount     $ 3.3  
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition     2 years 8 months 12 days  
Stock Issued During Period, Shares Settlement of Deferred Stock Units (in shares)     17,621  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)       0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)     17,156  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares, Ending Balance (in shares)     1,664,684 1,241,137
The 2019 Omnibus Incentive Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) 4,000,000      
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)     2,818,103  
Common Stock, Capital Shares Reserved for Future Issuance (in shares)     196,572  
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 10 years      
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member] | Minimum [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 1 year      
The 2019 Omnibus Incentive Plan [Member] | Employee and Non-employee Stock Options [Member] | Maximum [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 4 years      
The 2019 Omnibus Incentive Plan [Member] | Nonemployee Stock Options [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) 5 years      
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) 1 year      
The 2021 Employment Inducement Incentive Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)   10 years    
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)   1,000,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)     605,000  
Stock Option Prior Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)     447,910  
The 2012 DSU Plan [Member]        
Common Stock, Capital Shares Reserved for Future Issuance (in shares)     17,333  
The 2019 Omnibus Incentive Plan, Stock Option Prior Plan, and the 2012 DSU Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value     $ 1.7 $ 1.0
Non-employee Director Compensation Program [Member] | Deferred Share Unit Plan [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number     214,000 134,000
Stock Issued During Period, Shares Settlement of Deferred Stock Units (in shares)     17,621  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)     17,621  
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares, Ending Balance (in shares)     0 0
Non-employee Director Compensation Program [Member] | Restricted Stock Units (RSUs) [Member]        
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number     0 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)     17,156  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)     17,156