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

December 31,

 
   

2022

   

2021

 

Raw materials

  $ 3,374     $ 2,503  

Work-in-process

    17       1  

Finished products

    1,574       2,097  

Total inventories

  $ 4,965     $ 4,601