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Inventory (Tables)
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventory
Inventory consists of the following (in thousands):
 
December 31,
 
2019
 
2018
Raw materials
$
1,673

 
$
1,846

Work-in-process
8,267

 
6,403

Finished goods
2,725

 
3,132

Total inventory
$
12,665

 
$
11,381