Revenue (Tables)

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

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

	Year Ended December 31,
	2020				2019
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	4,010	29	%	$	10,453	83	%
Asia Pacific	906		6	%	469		4	%
Europe and Middle East	9,035		65	%	1,680		13	%
Total	13,951		100	%	12,602		100	%
Revenue by timing of recognition:
Recognized at a point in time	2,639		19	%	9,666		77	%
Recognized over time	11,312		81	%	2,936		23	%
Total	13,951		100	%	12,602		100	%
Revenue by segment:
Autonomy Solutions	11,387		82	%	9,666		77	%
Component Sales	2,564		18	%	2,936		23	%
Total	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 liabilities balances consisted of the following (in thousands): 

	December 31,
	2020		2019
Beginning balance	$	225	$	—
Revenue recognized that was included in the contract liabilities beginning balance	(225)		—
Increase due to cash received and not recognized as revenue and billings in excess of revenue recognized during the period	2,284		225
Ending balance	$	2,284	$	225