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Note 7 - Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

September 30,

  

December 31,

 
  

2020

  

2019

 

Raw materials

 $11,802  $10,540 

Work in process

  2,510   2,279 

Finished goods

  5,176   5,457 

Total inventory

 $19,488  $18,276