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Note 18 - Net Loss Per Share (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

Three-months Ended

  

Nine-months Ended

 
  

September 30,

  

September 30,

 
  

2021

  

2020

  

2021

  

2020

 

Convertible debt

  1,271,406   5,733,735   1,163,866   5,425,999