Goodwill - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill [Line Items]
Beginning balance	$ 27,631
Impairment of goodwill	(6,370)
Goodwill		$ 27,631
Accumulated impairment losses	(6,370)
Ending Balance	21,261
Thermal Processing Solutions
Goodwill [Line Items]
Beginning balance	5,905
Goodwill		5,905
Ending Balance	5,905
Semiconductor Fabrication Solutions
Goodwill [Line Items]
Beginning balance	21,726
Impairment of goodwill	(6,370)
Goodwill		$ 21,726
Accumulated impairment losses	(6,370)
Ending Balance	$ 15,356