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Note 4 - Accounts Receivable (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

March 31,

  

December 31,

 
  

2024

  

2023

 
         

Accounts receivable

 $1,607,561  $2,207,311 

Allowance for credit losses

  (905,785)  (1,005,785)

Accounts receivable, net of allowances for credit losses

 $701,776  $1,201,526