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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
$
318

 
$
516

Work in process
4,299

 
11,123

Finished goods
5,206

 
4,936

Inventory, gross
9,823

 
16,575

Reserve for obsolescence
(719
)
 
(589
)
Inventory, net
$
9,104

 
$
15,986