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Note 19 - Basic and Diluted Net Loss Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

December 31

 
  

2020

  

2019

 

Stock options

  4,361,872   1,830,958 

Stock warrants

  46,498,909   2,071,172 

Nonvested restricted stock units

  2,959,099   443,927 

Total

  53,819,880   4,346,057