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Note 4 - Accounts Receivable (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   

June 30,

   

December 31,

 
   

2025

   

2024

 
                 

Accounts receivable

  $ 1,366,787     $ 1,351,482  

Allowance for credit losses

    (383,253 )     (633,253 )

Accounts receivable, net of allowances for credit losses

  $ 983,534     $ 718,229