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Note 5 - Prepaid Expense and Other Current Assets (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

September 30,

2025

  

December 31,

2024

 
  

(Unaudited)

     

Prepaid expense and other current assets:

        

Prepaid insurance

 $658  $827 

Prepaid clinical development costs

  44   824 

Other prepaid expense

  335   208 

Total prepaid expense and other current assets

 $1,437  $1,859