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Inventory
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventory Inventory
Inventory consists of the following:
(in thousands)
 
JUNE 30, 2019
 
DECEMBER 31, 2018
Raw materials
 
$
766

 
$
836

Work-in-process
 
7,671

 
6,885

Finished goods
 
1,982

 
2,391

Total inventory
 
$
10,419

 
$
10,112