Inventory

9 Months Ended

Sep. 30, 2019

Inventory

Inventory

7. Inventory

Inventory consisted of the following:

	As of September 30,		As of December 31,
	2019		2018
Raw materials	$	1,531	$	496
Work in process		889		671
Finished goods		6,340		6,650
Total inventory	$	8,760	$	7,817

The aggregate charges related to excess inventory for the three and nine months ended September 30, 2019 and 2018 were immaterial. These expenses were recorded as a component of cost of product revenues.