Inventories (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	As of
	June 30, 2021		December 31, 2020
Parts and work-in-process	$	102	$	122
Finished goods	82		69
Total inventories	$	184	$	191