Financial Statement Components - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Inventory write-downs	$ 2,900		$ 3,900	$ 20,737	$ 17,343
Depreciation and amortization	4,700		10,800	17,100	16,200
Restructuring and related cost, accelerated depreciation	900			4,400
Amortization expense	1,000		1,100	3,032	3,300	$ 4,323
Impairment of goodwill				3,396		12,489
Estimated contract losses	3,200		$ 3,900	15,700	$ 11,000
ATS
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill				3,396		12,489
Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill				0		0
Freedom Photonics
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill	3,400					12,500
Estimated contract losses		$ 12,500
Freedom Photonics | ATS
Finite-Lived Intangible Assets [Line Items]
Cumulative goodwill impairment charge	15,900			15,900
Freedom Photonics | Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Cumulative goodwill impairment charge	0			$ 0
Freedom Photonics | IPR&D
Finite-Lived Intangible Assets [Line Items]
Impairment charges	$ 3,300					$ 3,000