Segment and Customer Concentration Information - Segment Operating Results and Reconciliation to the Consolidated Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Total revenue	$ 69,779	$ 40,698	$ 31,944
Depreciation and amortization	26,624	6,566	4,162
Operating loss	(563,308)	(442,402)	(214,552)
Other significant items:
Segment assets	512,367	687,327	883,536
Inventories, net	12,196	8,792	10,342
Eliminations
Revenue:
Depreciation and amortization	0	0	0
Operating loss	0	(335)	(95)
Other significant items:
Segment assets	(134,937)	(125,290)	(8,939)
Inventories, net	(37)	(346)	0
Reportable Segments
Revenue:
Depreciation and amortization	26,624	6,566	4,162
Operating loss	(563,308)	(442,067)	(214,457)
Other significant items:
Segment assets	647,304	812,617	892,475
Inventories, net	12,233	9,138	10,342
Autonomy Solutions
Revenue:
Total revenue	48,835	24,353	28,497
Autonomy Solutions | Reportable Segments
Revenue:
Depreciation and amortization	23,935	4,110	3,723
Operating loss	(513,668)	(412,673)	(214,133)
Other significant items:
Segment assets	595,868	752,088	882,704
Inventories, net	11,162	8,664	10,179
ATS
Revenue:
Total revenue	20,944	16,345	3,447
ATS | Reportable Segments
Revenue:
Depreciation and amortization	2,689	2,456	439
Operating loss	(49,640)	(29,394)	(324)
Other significant items:
Segment assets	51,436	60,529	9,771
Inventories, net	$ 1,071	$ 474	$ 163