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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 
  

2022

  

2021

  

2022

  

2021

 

Stock options

  1,248,513   384,444   1,158,220   317,909 

Equity awards

  76,036   35,275   36,826   68,341