Reportable Segments - Schedule of Reportable Segments Information (Parenthetical) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Income tax provision (benefit)	$ 2,334,000	$ 975,000
Thermal Processing Solutions
Segment Reporting Information [Line Items]
Income tax provision (benefit)	1,400,000	800,000
Semiconductor Fabrication Solutions
Segment Reporting Information [Line Items]
Income tax provision (benefit)	$ 13,000	$ (200,000)