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Note 7 - Leases (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Year ending December 31,
 
Amounts
 
2020
  $
19,170
 
2021
   
19,170
 
2022
   
19,170
 
2023
   
1,598
 
2024
   
-
 
Total
  $
59,108