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Note 6 - Prepaid Expenses (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

June 30,

  

December 31,

 
  

2026

  

2025

 
  

(unaudited)

     

Prepaid director and officer liability insurance

 $21  $30 

Prepaid supplies

  120   190 

Prepaid software subscriptions

  189   50 

Prepaid consulting contracts

  3   25 

Prepaid research and development costs

     40 

Other

  191   11 

Total prepaid expenses and other current assets

 $524  $346