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Note 4 - Prepaid 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 expenses

 $871  $966 

Receivable for issuance of common stock

     1,679 

Other

  64   61 

Total prepaid and other current assets

 $935  $2,706