v3.25.2
Note 7 - Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

Number of

   

Weighted

 
   

Common Stock

   

Average

 
   

Equivalents

   

Exercise Price

 

Balance as of December 31, 2024

    2,467,104     $ 3.10  

Warrants for common stock sold

    681,514       1.92  

Balance as of June 30, 2025

    3,148,618     $ 2.84  
Schedule of Activity Under Sales Agreement [Table Text Block]
   

Three months ended

   

Six months ended

 
   

June 30,

   

June 30,

 
   

2025

   

2024

   

2025

   

2024

 

Common shares sold

    140,104       335,112       221,378       412,239  

Gross proceeds

  $ 350     $ 1,847     $ 562     $ 2,438  

Associated issuance costs

  $ 45     $ 71     $ 72     $ 103