Quarterly report [Sections 13 or 15(d)]

Note 8 - Common Stock Warrant Liabilities (Tables)

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Note 8 - Common Stock Warrant Liabilities (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
   

October 2022

 
   

Warrants

 

Fair value of warrants outstanding as of December 31, 2024

  $ 16  

Change in fair value of warrants

    (15 )

Fair value of warrants outstanding as of March 31, 2025

  $ 1  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   

March 31,

   

December 31,

 
   

2025

   

2024

 

Stock price

  $ 0.30     $ 2.00  

Risk-free interest rate

    4.35 %     4.27 %

Expected dividend yield

           

Expected term in years

    2.5       2.8  

Expected volatility

    160 %     155 %