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Inventory
9 Months Ended
Sep. 30, 2023
Inventory  
Inventory

9. Inventory

Inventory as of September 30, 2023 and December 31, 2022 consisted of the following:

September 30,

December 31,

2023

2022

Raw materials

$

14,393

$

5,600

Work in process

9,186

24,672

Finished goods

10,546

16,229

Total inventory

$

34,125

$

46,501

The aggregate charges related to excess and obsolete inventory for the three and nine months ended September 30, 2023 were $563 and $1,624, respectively. These expenses were recorded as a component of cost of product revenues. The aggregate charges related to excess and obsolete inventory for the three and nine months ended September 30, 2022 were immaterial.