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Note 8 - Convertible Notes (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
June 30,
2020
   
December 31,
2019
 
Convertible note payable, due on demand, for the original amount of CAD 1,104,713, bearing interest at 7% per annum with conversion rights for 335,833 common shares.
  $
810,638
    $
850,519
 
                 
Convertible notes payable to multiple private investors, including certain notes in default, bearing interest at 5% per annum with conversion rights for 3,489,990 common shares, maturing at various dates between May 2018 and June 2022.
   
5,623,807
     
5,373,806
 
                 
Total convertible notes payable
   
6,434,445
     
6,224,325
 
Less current portion
   
5,894,565
     
5,185,412
 
 
Convertible notes payable, less current portion
  $
539,880
    $
1,038,913