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Note 4 - Prepaid Expenses 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,

   

December 31,

 
   

2025

   

2024

 

Series E Preferred Stock deferred financing costs

  $ 36     $  

Dues & subscriptions

    59       82  

Prepaid taxes & licenses

    53       55  

Prepaid insurance

    18       48  

Other receivables

    6       76  

Other

    49       11  

Total prepaid expenses and other current assets

  $ 221     $ 272