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Note 10 - Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

2025

  

2024

 

Outstanding, December 31

  11,391,225   5,021,354 

Warrants issued in connection with public offering and private placement

  -   1,139,831 

Exercises and conversions

  -   - 

Outstanding, September 30

  11,391,225   6,161,185 
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
  

September 30, 2025

 
      

Weighted

     
      

Average

  

Aggregated

 
  

Number of

  

Grant-Date

  

Intrinsic

 
  

units

  

Fair value

  

Value

 
             

Outstanding, December 31, 2024

  357,903  $3.25  $- 

Granted

  478,890   1.97   - 

Vested and settled with share issuance

  (180,015)  3.28   - 

Forfeited

  (47,393)  2.79   - 

Outstanding, September 30, 2025

  609,385  $2.27  $-