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Note 7 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   
Rental
Commitments
 
2019
  $
28,774
 
2020
   
116,464
 
2021
   
118,519
 
2022
   
39,735
 
Total
   
303,492
 
Less: imputed interest
   
(33,776
)
    $
269,716
 
   
Rental
Commitments
 
2019
  $
114,409
 
2020
   
116,464
 
2021
   
118,519
 
2022
   
39,735
 
    $
389,127