Financial Statement Components - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 7,390	$ 18,816
Impairment of goodwill related to Freedom Photonics	(3,396)	(12,489)
Ending balance	3,994	7,390
Balance as of September 30, 2024	3,994	7,390
Seagate
Goodwill [Roll Forward]
Goodwill related to acquisition of Seagate’s lidar business		1,063
Autonomy Solutions
Goodwill [Roll Forward]
Beginning balance	1,750	687
Impairment of goodwill related to Freedom Photonics	0	0
Ending balance	1,750	1,750
Balance as of September 30, 2024	1,750	1,750
Autonomy Solutions | Seagate
Goodwill [Roll Forward]
Goodwill related to acquisition of Seagate’s lidar business		1,063
ATS
Goodwill [Roll Forward]
Beginning balance	5,640	18,129
Impairment of goodwill related to Freedom Photonics	(3,396)	(12,489)
Ending balance	2,244	5,640
Balance as of September 30, 2024	$ 2,244	5,640
ATS | Seagate
Goodwill [Roll Forward]
Goodwill related to acquisition of Seagate’s lidar business		$ 0