Revenue (Tables)

6 Months Ended

Jun. 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 June 30,
	2021				2020
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	4,061	64	%	$	640	19	%
Asia Pacific	154		2	%	205		6	%
Europe and Middle East	2,094		33	%	2,579		75	%
Total	$	6,309	100	%	$	3,424	100	%
Revenue by timing of recognition:
Recognized at a point in time	$	1,988	32	%	$	182	5	%
Recognized over time	4,321		68	%	3,242		95	%
Total	$	6,309	100	%	$	3,424	100	%
Revenue by segment:
Autonomy Solutions	$	5,822	92	%	$	2,809	82	%
Component Sales	487		8	%	615		18	%
Total	$	6,309	100	%	$	3,424	100	%

	Six Months Ended June 30,
	2021				2020
	Revenue		% of Revenue		Revenue		% of Revenue
Revenue by primary geographical market:
North America	$	6,600	57	%	$	1,725	24	%
Asia Pacific	475		4	%	213		3	%
Europe and Middle East	4,547		39	%	5,358		73	%
Total	$	11,622	100	%	$	7,296	100	%
Revenue by timing of recognition:
Recognized at a point in time	$	4,041	35	%	$	790	11	%
Recognized over time	7,581		65	%	6,506		89	%
Total	$	11,622	100	%	$	7,296	100	%
Revenue by segment:
Autonomy Solutions	$	10,158	87	%	$	6,106	84	%
Component Sales	1,464		13	%	1,190		16	%
Total	$	11,622	100	%	$	7,296	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): 

	June 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	586		2,284
Ending balance	$	586	$	2,284