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Note 3 - Inventories (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

June 30,

   

December 31,

 
   

2022

   

2021

 

Raw materials

  $ 3,156     $ 2,503  

Work-in-process

    338       1  

Finished products

    1,684       2,097  

Total inventories

  $ 5,178     $ 4,601