Segment and Revenue Information - Schedule of Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 24,953	$ 42,236
Gross profit	3,059	15,797
R&D expense	5,351	4,627
Operating (loss) income	(11,540)	2,498
Operating segments
Segment Reporting Information [Line Items]
Revenue	24,953	42,236
Operating (loss) income	(2,292)	11,170
Operating segments | Aerospace And Defense
Segment Reporting Information [Line Items]
Revenue	21,675	9,900
Gross profit	4,108	1,684
R&D expense	4,349	4,162
Operating (loss) income	(241)	(2,478)
Operating segments | Broadband
Segment Reporting Information [Line Items]
Revenue	3,278	32,336
Gross profit	(1,049)	14,113
R&D expense	1,002	465
Operating (loss) income	$ (2,051)	$ 13,648