Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

Total revenue based on the disaggregation criteria described above, as well as revenue by segment, are as follows (in thousands):

	Year Ended December 31,
	2021				2020				2019
	Revenue		% of Revenue		Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	23,043	72	%	$	4,010	29	%	$	10,453	83	%
Asia Pacific	2,502		8	%	906		6	%	469		4	%
Europe and Middle East	6,399		20	%	9,035		65	%	1,680		13	%
Total	31,944		100	%	13,951		100	%	12,602		100	%
Revenue by timing of recognition:
Recognized at a point in time	8,892		28	%	2,639		19	%	9,666		77	%
Recognized over time	23,052		72	%	11,312		81	%	2,936		23	%
Total	31,944		100	%	13,951		100	%	12,602		100	%
Revenue by segment:
Autonomy Solutions	28,497		89	%	11,387		82	%	9,666		77	%
Components	3,447		11	%	2,564		18	%	2,936		23	%
Total	31,944		100	%	13,951		100	%	12,602		100	%

Schedule of Opening and Closing Balances of Contract Liabilities and Significant Changes in Contract Liabilities

The significant changes in contract assets balances consisted of the following (in thousands): 

	December 31,
	2021		2020
Beginning balance	$	—	$	—
Revenue recognized for performance obligations that have been satisfied but for which amounts have not been billed	9,907		—
Ending balance	$	9,907	$	—

The significant changes in contract liabilities balances consisted of the following (in thousands): 

	December 31,
	2021		2020
Beginning balance	$	2,284	$	225
Revenue recognized that was included in the contract liabilities beginning balance	(1,792)		(225)
Increase due to cash received and not recognized as revenue and billings in excess of revenue recognized during the period	406		2,284
Ending balance	$	898	$	2,284