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Note 6 - Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   

March 31,

   

December 31,

 
   

2025

   

2024

 

Project expenses

  $ 11,448     $ 2,873  

Compensation and benefits

    1,492       2,793  

Other

    274       621  

Total accrued expenses

  $ 13,214     $ 6,287