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Note 3 - Inventories (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  March 31,  December 31, 
  

2025

  

2024

 

Raw materials

 $24  $18 

Finished goods

  47   15 

Inventories

 $71  $33