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Note 6 - Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   

September 30,

   

December 31,

 
   

2024

   

2023

 

Project expenses

  $ 64     $ 336  

Compensation and benefits

    2,685       1,938  

Other

    167       240  

Total accrued expenses

  $ 2,916     $ 2,514