Inventories (Tables)

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Summary of Inventories

Inventories consisted of the following:

	As of
	March 31, 2021		December 31, 2020
Parts and work-in-process	$	115	$	122
Finished goods	76		69
Total inventories	$	191	$	191