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Note 8 - Accrued and Other Current Liabilities (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
  

September 30,

2025

  

December 31,

2024

 
  

(Unaudited)

     

Accrued and other current liabilities:

        

Refund liability (see Note 9)

 $4,715  $4,715 

Professional services

  3,949   3,732 

Employee costs

  420   577 

Accrued research and development expense

  502   655 

Accrued Dura acquisition cost due post-closing

  191   - 

Other accrued expense

  98   470 

Total accrued and other current liabilities

 $9,875  $10,149