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Note 7 - Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
   
Rental Commitments
 
2020 (remaining)
  $
87,691
 
2021
   
118,519
 
2022
   
39,735
 
Total
   
245,945
 
Less: imputed interest
   
(22,188
)
Current and noncurrent operating lease liability
  $
223,757