Reportable Segments - Schedule of Reportable Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net Revenues		$ 24,385	$ 24,920
Operating income (loss)		339	(8,934)
Identifiable Assets		117,776		$ 118,953
Operating Segments | Thermal Processing Solutions
Segment Reporting Information [Line Items]
Net Revenues		18,684	17,527
Operating income (loss)		2,874	1,081
Identifiable Assets		68,638		68,051
Operating Segments | Semiconductor Fabrication Solutions
Segment Reporting Information [Line Items]
Net Revenues		5,701	7,393
Operating income (loss)		(358)	(7,844)
Identifiable Assets		45,258		46,915
Non-Segment Related
Segment Reporting Information [Line Items]
Operating income (loss)		(2,177)	$ (2,171)
Identifiable Assets	[1]	$ 3,880		$ 3,987

[1] * Non-segment related assets include cash, fixed assets, and other assets.