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Note 2 - Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

June 30,

   

December 31,

 
   

2020

   

2019

 

Finished goods

  $ 59,335     $ 65,413  

Work in process

    1,032       652  

Raw materials

    12,095       7,314  

Inventories

  $ 72,462     $ 73,379