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

June 30,

  

December 31,

 
  

2021

  

2020

 

Raw materials

 $20,529  $14,586 

Work-in-process

  11,218   12,634 

Finished goods

  2,710   2,704 
   34,457   29,924 

Less: Reserve for excess and obsolete inventory

  (2,506)  (3,200)

Net inventories

 $31,951  $26,724