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Note 10 - Net Loss Per Share (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

Warrants for common stock

 1,078,943 634,509

Employee stock options

 164,355 5,026

Series B Convertible Preferred Stock

 335,213 -

Series X Convertible Preferred Stock

 66,610 66,610

Restricted stock awards

 6,000 -

Total common stock equivalents

 1,651,121 706,145