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Inventories, net (Tables)
6 Months Ended
Jun. 30, 2020
Inventories, net  
Schedule of components of inventories

June 30,

December 31,

    

2020

    

2019

    

(in thousands)

Raw materials

$

92,208

$

95,867

Work in process

 

35,550

 

32,131

Finished goods (completed systems)

 

21,420

 

12,366

Inventories, net

$

149,178

$

140,364