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Inventory (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of inventory
Inventory consisted of the following:
(in thousands)
March 31,
2020
 
December 31,
2019
Raw materials
$
11,607

 
$
11,417

Work in process
12,445

 
9,450

Finished goods
6,762

 
8,313

Total inventory
$
30,814

 
$
29,180