Inventory

3 Months Ended

Mar. 31, 2021

Inventory

Inventory

6. Inventory

Inventory as of March 31, 2021 and December 31, 2020 consisted of the following (in thousands):

	March 31,		December 31,
	2021		2020
Raw materials and supplies - production locations	$	123,450	$	92,221
Raw materials and supplies - customer locations		12,538		12,405
Work-in-process		46,118		29,349
Finished goods		5,626		5,411
Inventory	$	187,732	$	139,386