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Inventory
 9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Inventory
Inventory
Inventory consisted of the following items (in thousands):
 
September 30, 2019
 
December 31, 2018
Raw materials
$
315

 
$
516

Work in process
7,085

 
11,123

Finished goods
5,626

 
4,936

 Inventory, gross
13,026

 
16,575

Reserve for obsolescence
(992
)
 
(589
)
 Inventory, net
$
12,034

 
$
15,986