Segment and Customer Concentration Information - Segment Operating Results and Reconciliation to the Consolidated Balances (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Revenue:
Revenue	$ 7,978	$ 4,223	$ 19,600	$ 11,519
Depreciation and amortization	908	688	2,240	1,929
Operating income (loss)	(70,145)	(21,796)	(143,590)	(56,481)
Other significant items:
Segment assets	607,806	191,453	607,806	191,453	$ 510,351
Inventories, net	7,871	2,921	7,871	2,921	$ 3,613
Reportable Segments
Revenue:
Revenue	11,873	5,675	28,965	14,702
Depreciation and amortization	908	688	2,241	1,929
Operating income (loss)	(70,401)	(21,796)	(143,751)	(56,481)
Other significant items:
Segment assets	617,495	194,757	617,495	194,757
Inventories, net	7,871	2,921	7,871	2,921
Eliminations
Revenue:
Revenue	(3,895)	(1,452)	(9,365)	(3,183)
Depreciation and amortization	0	0	(1)	0
Operating income (loss)	256	0	161	0
Other significant items:
Segment assets	(9,689)	(3,304)	(9,689)	(3,304)
Inventories, net	0	0	0	0
Autonomy Solutions
Revenue:
Revenue	7,550	3,481	17,708	9,587
Autonomy Solutions | Reportable Segments
Revenue:
Revenue	9,929	4,120	23,208	10,226
Depreciation and amortization	673	665	1,963	1,825
Operating income (loss)	(69,614)	(21,800)	(142,651)	(56,673)
Other significant items:
Segment assets	606,431	191,778	606,431	191,778
Inventories, net	7,531	2,912	7,531	2,912
Autonomy Solutions | Eliminations
Revenue:
Revenue	(2,379)	(639)	(5,500)	(639)
Component Sales
Revenue:
Revenue	428	742	1,892	1,932
Component Sales | Reportable Segments
Revenue:
Revenue	1,944	1,555	5,757	4,476
Depreciation and amortization	235	23	278	104
Operating income (loss)	(787)	4	(1,100)	192
Other significant items:
Segment assets	11,064	2,979	11,064	2,979
Inventories, net	340	9	340	9
Component Sales | Eliminations
Revenue:
Revenue	$ (1,516)	$ (813)	$ (3,865)	$ (2,544)