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Note 4 - Valuation Accounts (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Summary of Valuation Allowance [Table Text Block]
      

Net Charged

             
  

Balance

  

to

          

Balance End

 
  

Beginning of

  

Costs and

          

of

 
  

Year

  

Expenses

  

Transfers

  

Net Write-Off

  

Year

 

2023

                    

Allowance for expected credit losses

 $319,000  $  $  $  $319,000 

Reserve for processing losses

  755,494   71,034         826,528 

2022

                    

Allowance for expected credit losses

 $319,000  $  $  $  $319,000 

Reserve for processing losses

  623,494   132,000         755,494