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Note 3 - Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2020
Notes Tables  
Research and Development Expense [Table Text Block]
   
Three months ended June 30,
    
Six months ended June 30,
  
   
2020
    
2019
    
2020
    
2019
  
Salaries
   $
-
     $
11,195
     $
3,185
     $
17,641
  
Other costs
    
313
      
12,454
      
436
      
12,454
  
    $
313
     $
23,649
     $
3,621
     $
30,095