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Inventories (Tables)
3 Months Ended
Mar. 31, 2022
Inventories  
Components of inventories

The components of inventories are summarized below (in thousands):

March 31, 

December 31, 

    

2022

    

2021

 

Inventories:

Raw materials

$

32,949

$

29,658

Work in process

 

32,411

 

32,605

Finished goods

 

3,461

 

3,649

$

68,821

$

65,912