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Note 4 - Inventories (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

2022

   

2021

 
                 

Raw materials

  $ 2,165     $ 1,031  

Work-in-process

    373       194  

Total

  $ 2,538     $ 1,225