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Note 6 - Property and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  September 30, 2025  December 31, 2024 

Computers and equipment

 $24  $11 

Manufacturing tools and dies

     148 

Total property and equipment

  24   159 

Less accumulated depreciation

  (12)  (40)

Property and equipment, net

 $12  $119