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Note 7 - Convertible Notes (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
March 31,
2021
   
December 31,
2020
 
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.
  $
878,468
    $
867,641
 
                 
Convertible notes payable to multiple private investors, including certain notes in default, bearing interest at 5% per annum with conversion rights for 3,708,115 common shares, maturing at various dates between May 2018 and February 2023.
   
5,972,807
     
5,862,807
 
                 
Total convertible notes payable
   
6,851,275
     
6,730,448
 
Less current portion
   
6,763,275
     
6,652,448
 
Convertible notes payable, less current portion
  $
88,000
    $
78,000