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Note 13 - Commitments (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Lease, Cost and Other Information [Table Text Block]
                 
Lease cost
 
Three Months Ended September 30, 2019
   
Nine Months Ended September 30, 2019
 
Operating lease cost
  $
39,555
    $
118,664
 
Total lease cost
  $
39,555
    $
118,664
 
Other information
     
 
     
 
Cash paid for amounts included in the measurement of lease liabilities:
               
Operating cash flows from operating leases    
-
    $
118,664
 
Right-of-use assets obtained in exchange for new operating lease liabilities    
-
     
-
 
Weighted-average remaining lease term - operating leases    
-
     
0.4 years
 
Weighted-average discount rate - operating leases    
-
     
9.2
%
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
2019 (excluding the 9 months ended September 30, 2019 )
 
Operating Leases
 
2020
  $
39,555
 
2021
   
15,976
 
2022
   
-
 
2023
   
-
 
Thereafter
   
-
 
Total lease payments
  $
55,531
 
Less: interest
  $
(714
)
Total operating lease liabilities as of September 30, 2019
  $
54,817
 
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
   
Total
   
Less than 1 Year
   
1-3 Years
   
3-5 Years
 
Operating Lease Obligations
  $
175,557
    $
159,138
    $
16,419
    $
-