Financial Statement Components - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]
Inventory write-downs	$ 1,200,000	$ 2,900,000	$ 4,587,000	$ 20,737,000
Depreciation and amortization	3,200,000	4,700,000	9,900,000	17,100,000
Tangible asset impairment charges	6,000,000
Restructuring and related cost, accelerated depreciation			300,000
Impairment of intangible assets, finite-lived	1,500,000
Amortization expense			3,095,000		$ 4,188,000
Impairment of goodwill related to Optogration	2,200,000		2,244,000
Estimated contract losses (recoveries)	1,000,000	3,200,000	1,100,000	15,700,000
ATS
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill related to Optogration			2,244,000
Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Impairment of goodwill related to Optogration			0
Optogration, Inc.
Finite-Lived Intangible Assets [Line Items]
Amortization expense	1,000,000	$ 1,000,000	3,100,000	$ 3,000,000
Freedom Photonics | ATS
Finite-Lived Intangible Assets [Line Items]
Cumulative goodwill impairment charge	18,100,000		18,100,000
Freedom Photonics | Autonomy Solutions
Finite-Lived Intangible Assets [Line Items]
Cumulative goodwill impairment charge	$ 0		$ 0