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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventories  
Components of inventories

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

March 31, 

December 31, 

    

2021

    

2020

 

Inventories:

Raw materials

$

25,189

$

24,738

Work in process

 

26,288

 

24,215

Finished goods

 

3,204

 

2,562

$

54,681

$

51,515