Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedules of customers accounting for more than 10% of total Rrevenue

	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

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

Schedules of customers accounting for more than 10% of total Rrevenue

	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	%