Financial Statement Components - Narrative (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Inventory write-downs				$ 20,133,000	$ 19,547,000	$ 12,154,000
Depreciation and amortization				21,100,000	22,300,000	4,300,000
Incremental accelerated depreciation charges				4,400,000	9,200,000
Amortization expense				4,188,000	4,323,000
Impairment of goodwill				3,396,000	12,489,000
Estimated contract losses (recoveries)				0	16,400,000	$ 19,200,000
Outstanding loss provision (reversal)	$ 11,300,000
ATS
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill				3,396,000	12,489,000
Goodwill, measurement period adjustment			$ 12,500,000
Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill				0	0
Freedom Photonics
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill		$ 3,400,000			12,500,000
Goodwill, measurement period adjustment			$ 12,500,000
Freedom Photonics | ATS
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	15,900,000			15,900,000
Freedom Photonics | Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charge	$ 0			$ 0
Freedom Photonics | IPR&D
Finite-Lived Intangible Assets [Line Items]
Impairment charges		$ 3,300,000			$ 3,000,000