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Note 4 - Inventories, Net (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Finished goods

 $1,796  $1,249 

Work in process

  142   64 

Raw materials

  402   1,342 

Inventories, net

  2,340   2,655 

Less allowance for obsolescence

  (56)  - 

Inventories - net

 $2,284  $2,655