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Note 5 - Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

2020

   

2019

 

Raw materials

  $ 473     $ 470  

Work in process and finished goods

    752       787  

Inventory reserves

    (76 )     (64 )

Total

  $ 1,149     $ 1,193