Annual report [Section 13 and 15(d), not S-K Item 405]

Note 4 - Fair Value Measurement (Tables)

v3.25.4
Note 4 - Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2025
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
   

Total

   

Level 1

   

Level 2

   

Level 3

 

December 31, 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

 
   

Liability

 

Balance as of December 31, 2023

  $ 366  

Gain on revaluation of warrants issued in 2021, June 2020, December 2019, and May 2019 equity financings

    (474 )

Loss on modification of warrant

    109  

Balance as of December 31, 2024

  $ 1  

Gain on revaluation of warrants issued in 2021, June 2020, December 2019, and May 2019 equity financings

    (1 )

Balance as of December 31, 2025