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Inventory (Tables)
 3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Inventory
Inventory consisted of the following as of March 31, 2020 and December 31, 2019:

(in thousands)
March 31,
2020
 
December 31,
2019
Current assets
 
 
 
Finished goods
$
1,320

 
$
1,140

Total inventory, current
$
1,320

 
$
1,140

Non-Current assets
 
 
 
Raw materials
$
659

 
$
659

Work-in-process
949

 
1,109

Finished goods
934

 
1,056

Total inventory, non-current
2,542

 
2,824

Total inventory
$
3,862

 
$
3,964