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Inventory
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventory
Inventory
Inventory consisted of the following as of the date indicated (in thousands):
 
June 30, 2019
 
December 31, 2018
Raw materials
$
4,886

 
$
3,408

Work in process
4,426

 
4,054

Finished goods
7,158

 
5,711

Total inventory
$
16,470

 
$
13,173