Inventory

12 Months Ended

Dec. 31, 2022

Inventory

Inventory

7.  Inventory

Inventory as of December 31, 2022 and 2021, consists of the following (in thousands):

	December 31,		December 31,
	2022		2021
Raw materials and supplies - production locations	$	450,432	$	187,449
Raw materials and supplies - customer locations		18,860		16,294
Work-in-process		112,231		58,341
Finished goods		64,113		7,079
Inventory	$	645,636	$	269,163

As of December 31, 2022 and 2021, the reserve for excess and obsolete inventory was $5.4 million and $3.5 million, respectively.

Inventory is primarily comprised of raw materials, work-in-process, and finished goods. The increase in inventory is primarily due to a combination of new product offerings, as well as increased revenue and orders.