v3.25.2
Note 4 - Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2025
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Total

  

Level 1

  

Level 2

  

Level 3

 

June 30, 2025

                

Liabilities

                

Warrant liabilities

 $  $  $  $ 

December 31, 2024

                

Liabilities

                

Warrant liabilities

 $1  $  $  $1 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Warrant Liabilities

 

Balance as of March 31, 2025

 $ 

Gain on revaluation of warrants

   

Balance as of June 30, 2025

 $ 
  

Warrant Liabilities

 

Balance as of December 31, 2024

 $1 

Gain on revaluation of warrants

  (1)

Balance as of June 30, 2025

 $