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Note 6 - Valuation Accounts
12 Months Ended
Dec. 31, 2020
Notes to Financial Statements  
Allowance for Credit Losses [Text Block]
Note
6.
Valuation Accounts
 
Valuation and allowance accounts included the following at
December 31:
 
     
 
   
Net Charged
     
 
     
 
     
 
 
   
Balance
   
to
     
 
     
 
   
Balance End
 
   
Beginning of
   
Costs and
     
 
     
 
   
of
 
   
Year
   
Expenses
   
Transfers
   
Net Write-Off
   
Year
 
2020
                                       
Allowance for doubtful accounts
  $
123,165
    $
96,000
    $
    $
(13,643
)   $
205,522
 
Reserve for processing losses
   
506,153
     
132,000
     
     
(122,954
)    
515,199
 
2019
                                       
Allowance for doubtful accounts
  $
55,212
    $
89,613
    $
    $
(21,660
)   $
123,165
 
Reserve for processing losses
   
374,153
     
132,000
     
     
     
506,153