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

September 30,

   

December 31,

 
   

2025

   

2024

 

Trade accounts receivable

  $ 3,984,621     $ 3,033,612  

Allowance for current expected credit losses

    (209,166 )     (637,556 )

Total accounts receivable, net

  $ 3,775,455     $ 2,396,056  
Financing Receivable, Allowance for Credit Loss [Table Text Block]
   

September 30,

   

December 31,

 
   

2025

   

2024

 

Allowance for current expected credit losses at the beginning of the period

  $ 637,556     $ 134,912  

Bad debt expense

    (24,627 )     578,423  

Receivables written off during the period

    (482,470 )     (49,577 )

Effect of exchange rate changes

    78,707       (26,202 )

Allowance for current expected credit losses at the end of the period

  $ 209,166     $ 637,556