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Inventory
 3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventory

5. Inventory

Inventory consisted of the following (in thousands):

 

 

 

As of March 31,

2020

 

 

As of December 31,

2019

 

Work in progress

 

$

115

 

 

$

115

 

Finished goods

 

 

673

 

 

 

1,480

 

Total inventory

 

$

788

 

 

$

1,595

 

 

There were no charges related to excess inventory for the three months ended March 31, 2020 or 2019.