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Note 3 - Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Research and Development Expense [Table Text Block]
   
Three months ended September 30,
   
Nine months ended September 30,
 
   
2020
   
2019
   
2020
   
2019
 
Salaries
  $
3,383
    $
15,841
    $
6,568
    $
33,482
 
Other costs
   
280
     
4,584
     
716
     
17,038
 
    $
3,663
    $
20,425
    $
7,284
    $
50,520