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Note 2 - Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   

March 31,

   

December 31,

 
   

2021

   

2020

 

Finished goods

  $ 70,400     $ 73,979  

Work in process

    1,641       1,634  

Raw materials

    15,733       14,153  

Inventories

  $ 87,774     $ 89,766