Intangible Assets and Goodwill - Narrative (Details) - USD ($)	3 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 16,519,000	$ 17,894,000	$ 69,000
S and N and Emcore Chicago Acquisitions
Finite-Lived Intangible Assets [Line Items]
Amount of goodwill acquired	16,400,000
Expected tax deductible amount of goodwill	0
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	6,700,000	6,700,000
Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 2,200,000	$ 2,200,000
Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life (in years)	7 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life (in years)	8 years
Technology | Minimum
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life (in years)	2 years
Technology | Maximum
Finite-Lived Intangible Assets [Line Items]
Intangible assets useful life (in years)	8 years