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Note 4 - Accounts Receivable
3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Financing Receivables [Text Block]
NOTE
4.
     
ACCOUNTS RECEIVABLE
 
Accounts receivable consist of the following:
 
   
March 31,
   
December 31,
 
   
2020
   
2019
 
                 
Trade accounts
  $
3,593,213
    $
3,346,215
 
Premiums
   
1,312,793
     
971,963
 
Allowance for doubtful accounts
   
(73,480
)    
(127,635
)
                 
Total Accounts Receivable, net
  $
4,832,526
    $
4,190,543