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

September 30,

  

December 31,

 
  

2021

  

2020

 

Raw materials

 $15,101  $14,586 

Work-in-process

  8,814   12,634 

Finished goods

  3,525   2,704 
   27,440   29,924 

Less: Reserve for excess and obsolete inventory

  (2,564)  (3,200)

Net inventories

 $24,876  $26,724