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Note 3 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

September 30,

 
  

2025

  

2024

 

Stock options

  119,281   131,833 

Restricted stock awards

     33,333 

Common Stock warrants

  9,447,966   5,327,636 

Common Stock issuable upon conversion of Anson Notes

  2,127,880   3,236,280 

Totals

  11,695,127   8,729,082