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Note 5 - Inventories, Net (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Schedule of Inventory, Current [Table Text Block]

Inventories consist of:

               
   

March 31, 2023

    December 31, 2022  
                 

Raw materials

  $ 2,542     $ 2,165  

Work-in-process

    259       373  

Total

  $ 2,801     $ 2,538