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Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Sep. 30, 2025
Goodwill [Line Items]
Beginning balance		$ 908	$ 21,261	$ 21,261
Impairment of goodwill	$ (20,400)	0	(20,353)	(20,353)
Ending balance		908		908
Thermal Processing Solutions
Goodwill [Line Items]
Beginning balance		908	5,905	5,905
Impairment of goodwill	(5,000)	0		4,997
Ending balance		908		908
Semiconductor Fabrication Solutions
Goodwill [Line Items]
Beginning balance		0	$ 15,356	15,356
Impairment of goodwill	$ (15,400)	0		15,356
Ending balance		$ 0		$ 0

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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