Annual report pursuant to Section 13 and 15(d)

Note 1 - Organization and Summary of Significant Accounting Policies (Tables)

v3.23.1
Note 1 - Organization and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

2022

   

2021

 

Expected volatility

    92% - 100%       90% - 102%  

Weighted-average volatility

      94%           95%    

Expected forfeiture rate

    8.4% - 8.9%       5.2% - 9.0%  

Expected term (in years)

    6.2 - 6.3       5.5 - 6.2  

Risk-free rate

    1.7% - 2.5%       0.6% - 1.4%  

Expected dividends