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Note 11 - Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
 
 
 
 
 
 
 
 
Weighted
   
 
 
 
   
 
 
 
 
Weighted
   
Average
   
 
 
 
   
 
 
 
 
Average
   
Remaining
   
Aggregate
 
   
 
 
 
 
Exercise
   
Contractual
   
Intrinsic
 
Warrants
 
Shares
   
Price
   
Life (Years)
   
Value
 
                                 
Outstanding at December 31, 2018
   
30,000
    $
0.70
     
2.5
    $
-
 
Issued
   
-
     
-
     
-
     
-
 
Exercised
   
-
     
-
     
-
     
-
 
Forfeited/Cancelled
   
-
     
-
     
     
-
 
Outstanding at September 30, 2019
   
30,000
    $
0.70
     
1.7
     
-
 
                                 
Exercisable at September 30, 2019
   
30,000
    $
0.70
     
1.7
     
-