Inventory

6 Months Ended

Jun. 30, 2020

Inventory

Inventory

7. Inventory

Inventory as of June 30, 2020 and December 31, 2019 consisted of the following:

	As of June 30,		As of December 31,
	2020		2019
Raw materials	$	5,153	$	795
Work in process		2,643		1,427
Finished goods		11,019		7,421
Total inventory	$	18,815	$	9,643

The aggregate charges related to excess inventory for the three and six months ended June 30, 2020 and 2019 were immaterial. These expenses were recorded as a component of cost of product revenues. During the three and six months ended June 30, 2020, inventory used in the construction and installation of property and equipment was $219 and $613, respectively. During the three and six months ended June 30, 2019, inventory used in the construction and installation of property and equipment was immaterial.