Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables present revenue disaggregated by geography of the customer’s shipping location for the three and nine months ended September 30, 2021 and 2020:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
United States	$	2,033	$	1,959	$	5,910	$	3,403
Greater China	7,591		4,548		17,800		9,868
Rest of North America	1,286		167		2,513		525
South America	409		214		1,004		483
Rest of Asia Pacific	127		455		701		1,168
Europe	711		243		1,523		510
Total revenue	$	12,157	$	7,586	$	29,451	$	15,957

Schedule of Contract Liabilities

The following table presents the liabilities associated with the engineering services contracts as of September 30, 2021 and December 31, 2020:

	September 30, 2021		December 31, 2020
Deferred revenue	$	377	$	1,665

Schedules of Customers Accounting for More Than 10% of Total Revenue

As identified below, some of our customers accounted for more than 10% of the Company’s total revenue for the three and nine months ended September 30, 2021 and 2020:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Customer A	25.7	%	51.6	%	39.3	%	57.3	%
Customer B	12.9	%	10.3	%	5.4	%	13.6	%
Customer C	—	%	13.2	%	—	%	6.4	%