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Note 6 - Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   

September 30,

   

December 31,

 
   

2025

   

2024

 

Project expenses

  $ 6,060     $ 2,873  

Compensation and benefits

    2,483       2,793  

Other

    141       621  

Total accrued expenses

  $ 8,684     $ 6,287