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Note 13 - Basic and Diluted Net Loss Per Share (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   

March 31,

 
   

2024

   

2023

 

Stock options

    15,961,063       10,319,169  

Nonvested restricted stock units

    20,958,814       12,657,094  

Stock warrants

    24,830,500       1,021,076  

Total

    61,750,377       23,997,339