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Note 6 - Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
  

December 31, 2022

 
  

Fair Value Measurement Category

 
  

Level 1

  

Level 2

  

Level 3

 

Assets:

            

Cash and cash equivalents

 $43,574  $  $ 

Restricted Cash

  3,055       

Liabilities:

            

Fair value of warrant liability

        3,473 
  

December 31, 2023

 
  

Fair Value Measurement Category

 
  

Level 1

  

Level 2

  

Level 3

 

Assets:

            

Cash and cash equivalents

 $20,023  $  $ 

Restricted cash

  2,172       

Liabilities:

            

Fair value of warrant liability

        1,033 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

December 31, 2023

 

Warrants liability as of January 1, 2023

 $3,473 

Change in fair value of warrants

  (2,440)

Warrants liability as of December 31, 2023

 $1,033