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Note 13 - Leases (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Lessee, Operating Lease, Costs, Assets and Liabilities [Table Text Block]
   
3 Months ended
June 30,
   
6 Months ended
June 30,
 
   
20
20
   
20
20
 
                 
Lease cost
 
 
 
 
 
 
 
 
Operating lease cost
  $
53,723
    $
107,445
 
Total lease cost
  $
53,723
    $
107,445
 
                 
Balance sheet information
   
 
 
 
Operating ROU assets
    $
552,954
 
                 
Operating lease liabilities, current portion
    $
204,282
 
Operating lease liabilities, non-current portion
     
346,064
 
Total operating lease liabilities
    $
550,346
 
                 
Weighted average remaining lease term (in years) – operating leases
     
2.75
 
Weighted average discount rate – operating leases
     
5.50
%
Lessee, Operating Lease, Supplemental Cash Flow Information [Table Text Block]
Cash paid for amounts included in the measurement of operating lease liabilities
  $
104,602
 
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
2020 (remaining six months)
  $
119,384
 
2021
   
223,377
 
2022
   
165,194
 
2023
   
89,226
 
Total future lease payments
  $
597,181
 
Less: imputed interest
   
(46,835
)
Total
  $
550,346