Revenue (Tables)

9 Months Ended

Sep. 30, 2021

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 September 30,
	2021				2020
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	5,713	72	%	$	1,473	35	%
Asia Pacific	—		—	%	507		12	%
Europe and Middle East	2,265		28	%	2,243		53	%
Total	$	7,978	100	%	$	4,223	100	%
Revenue by timing of recognition:
Recognized at a point in time	$	873	11	%	$	1,286	30	%
Recognized over time	7,105		89	%	2,937		70	%
Total	$	7,978	100	%	$	4,223	100	%
Revenue by segment:
Autonomy Solutions	$	7,550	95	%	$	3,481	82	%
Component Sales	428		5	%	742		18	%
Total	$	7,978	100	%	$	4,223	100	%

	Nine Months Ended September 30,
	2021				2020
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	12,313	63	%	$	3,198	28	%
Asia Pacific	475		2	%	720		6	%
Europe and Middle East	6,812		35	%	7,601		66	%
Total	$	19,600	100	%	$	11,519	100	%
Revenue by timing of recognition:
Recognized at a point in time	$	4,914	25	%	$	2,076	18	%
Recognized over time	14,686		75	%	9,443		82	%
Total	$	19,600	100	%	$	11,519	100	%
Revenue by segment:
Autonomy Solutions	$	17,708	90	%	$	9,587	83	%
Component Sales	1,892		10	%	1,932		17	%
Total	$	19,600	100	%	$	11,519	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): 

	September 30, 2021		December 31, 2020
Beginning balance	$	2,284	$	225
Revenue recognized that was included in the contract liabilities beginning balance	(2,284)		(225)
Net increase due to cash received and not recognized as revenue and billings in excess of revenue recognized during the period	579		2,284
Ending balance	$	579	$	2,284