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Note 7 - Stock Options and Stock Warrants (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Year ended
 
2018
   
2017
 
December 31,
                               
   
Number of
   
Range of
   
Number of
   
Range of
 
   
Warrants
   
Exercise Price
   
Warrants
   
Exercise Price
 
Outstanding at beginning of year
   
-
   
$0.07 (CND)
     
464,000
   
$0.07 (CND)
 
Issued
   
-
     
N/A
     
-
     
N/A
 
Exercised
   
-
     
N/A
     
-
     
N/A
 
Expired
   
-
     
N/A
     
464,000
     
N/A
 
Outstanding at
end of year
   
-
     
N/A
     
-
   
$0.07 (CND)