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Inventory
12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventory

4.

Inventory

Inventory consisted of the following (in thousands):

 

 

 

December 31,

2021

 

 

December 31,

2020

 

Raw materials

 

$

2,727

 

 

$

2,664

 

Work in process

 

 

405

 

 

 

747

 

Finished goods

 

 

484

 

 

 

1,926

 

Total inventory

 

$

3,616

 

 

$

5,337