Acquisitions - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended	12 Months Ended
	Aug. 09, 2022	Apr. 29, 2022	Mar. 31, 2023	Mar. 31, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Increase in goodwill				$ (1,472)	$ 17,825
Transaction costs			$ 1,300	3,300
L3Harris Technologies, Inc.
Business Acquisition [Line Items]
Total purchase price		$ 5,000
Payments to acquire business		4,900
Revenue			6,700	12,300
Net income (loss)			400	1,400
Purchase price allocation				2,300
Reduction to contract assets				2,300
Reduction in asset retirement obligation				600
Increase in goodwill				600
Intangible assets acquired		$ 2,740
KVH Industries, Inc
Business Acquisition [Line Items]
Payments to acquire business	$ 55,000
Revenue			8,800	16,600
Net income (loss)			400	1,700
Intangible assets acquired			12,770	12,770
KVH Industries, Inc | In Process Research and Development
Business Acquisition [Line Items]
Intangible assets acquired			6,700	6,700
KVH Industries, Inc | Trademarks
Business Acquisition [Line Items]
Intangible assets acquired			2,200	2,200
KVH Industries, Inc | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired			4,000	4,000
KVH Industries, Inc | Technology
Business Acquisition [Line Items]
Intangible assets acquired			2,600	2,600
S and N and Emcore Chicago Acquisitions
Business Acquisition [Line Items]
Amount of goodwill acquired			$ 16,400	$ 16,400
EMCORE Chicago
Business Acquisition [Line Items]
Goodwill acquired (as percent)			80.70%	80.70%