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Inventory (Tables)
 3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventory
Inventory consisted of the following (in thousands):
 
March 31, 2020
 
December 31, 2019
Raw materials
$
330

 
$
318

Work in process
3,913

 
4,299

Finished goods
5,587

 
5,206

 Inventory, gross
9,830

 
9,823

Reserve for obsolescence
(583
)
 
(719
)
 Inventory, net
$
9,247

 
$
9,104