Revenue (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

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):

	Three Months Ended March 31,
	2021				2020
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	2,539	48	%	$	1,085	28	%
Asia Pacific	321		6	%	8		—	%
Europe and Middle East	2,453		46	%	2,779		72	%
Total	$	5,313	100	%	$	3,872	100	%
Revenue by timing of recognition:
Recognized at a point in time	$	2,053	39	%	$	608	16	%
Recognized over time	3,260		61	%	3,264		84	%
Total	$	5,313	100	%	$	3,872	100	%
Revenue by segment:
Autonomy Solutions	$	4,336	82	%	$	3,297	85	%
Component Sales	977		18	%	575		15	%
Total	$	5,313	100	%	$	3,872	100	%

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): 

	March 31, 2021		December 31, 2020
Beginning balance	$	2,284	$	225
Revenue recognized that was included in the contract liabilities beginning balance	(1,667)		(225)
Increase due to cash received and not recognized as revenue and billings in excess of revenue recognized during the period	37		2,284
Ending balance	$	654	$	2,284

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