Segment and Revenue Information - Schedule of Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Segment Reporting Information [Line Items]
Revenue	$ 26,820	$ 32,650	$ 51,773	$ 74,886
Gross profit	3,711	9,017	6,770	24,814
R&D expense	5,797	4,535	11,148	9,162
Operating (loss) income	(12,044)	(2,313)	(23,584)	185
Operating segments
Segment Reporting Information [Line Items]
Revenue	26,820	32,650	51,773	74,886
Operating (loss) income	(2,086)	4,482	(4,378)	15,652
Operating segments | Aerospace And Defense
Segment Reporting Information [Line Items]
Revenue	25,203	9,006	46,878	18,906
Gross profit	5,515	1,233	9,623	2,917
R&D expense	5,253	4,041	9,602	8,203
Operating (loss) income	262	(2,808)	21	(5,286)
Operating segments | Broadband
Segment Reporting Information [Line Items]
Revenue	1,617	23,644	4,895	55,980
Gross profit	(1,804)	7,784	(2,853)	(21,897)
R&D expense	544	494	1,546	959
Operating (loss) income	$ (2,348)	$ 7,290	$ (4,399)	$ 20,938