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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventories  
Schedule of inventories

As of December 31, 

(in thousands)

    

2020

    

2019

Raw materials

$

19,716

$

20,574

Work in process

 

12,040

 

10,165

Finished goods

 

44,673

 

37,465

Total inventories

$

76,429

$

68,204