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Inventory
3 Months Ended
Mar. 31, 2023
Inventory  
Inventory

8. Inventory

Inventory as of March 31, 2023 and December 31, 2022 consisted of the following:

March 31,

December 31,

2023

2022

Raw materials

$

5,831

$

5,600

Work in process

13,347

24,672

Finished goods

13,717

16,229

Total inventory

$

32,895

$

46,501

The aggregate charges related to excess and obsolete inventory for the three months ended March 31, 2023 was $906. These expenses were recorded as a component of cost of product revenues. The aggregate charges related to excess and obsolete inventory for the three months ended March 31, 2022 were immaterial.