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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventories  
Schedule of inventories

As of September 30, 

As of December 31, 

(in thousands)

    

2020

    

2019

Raw materials

$

20,047

$

20,574

Work in process

 

15,575

 

10,165

Finished goods

 

38,486

 

37,465

Total inventories

$

74,108

$

68,204