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Note 8 - Long-term Debt (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Debt [Table Text Block]
   

September 30,

   

December 31,

 
   

2025

   

2024

 

Senior promissory notes

  $ 6,000,000     $ 6,000,000  

Less: unamortized debt discount

    (577,475 )     (696,437 )

Total senior promissory notes payable, net

  $ 5,422,525     $ 5,303,563  
                 

Current portion of senior promissory notes payable

    -       -  

Senior promissory notes payable, less current portion

    5,422,525       5,303,563  

Total senior promissory notes payable, net

  $ 5,422,525     $ 5,303,563