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Note 6 - Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

As of December 31,

 
  

2021

  

2020

 

Raw materials

 $16,148  $14,586 

Work-in-process

  13,639   12,634 

Finished goods

  6,575   2,704 
   36,362   29,924 

Less: Reserve

  (2,985)  (3,200)

Net inventories

 $33,377  $26,724