Annual report pursuant to Section 13 and 15(d)

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

v3.22.1
Note 1 - Organization and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 

2021

 

2020

 

Expected volatility

90% - 102%   86% - 102%  

Weighted-average volatility

  95%       92%    

Expected forfeiture rate

5.2% - 9.0%   7.0% - 10.5%  

Expected term (in years)

5.5 - 6.2   5.5 - 6.0  

Risk-free rate

0.6% - 1.4%   0.4% - 1.5%  

Expected dividends