Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2025	Sep. 30, 2024
Concentration Risk [Line Items]
Percentage of cash balances	72.00%	66.00%
Investment, Type [Extensible Enumeration]	U S Treasuries And F D I C Insured [Member]	U S Treasuries And F D I C Insured [Member]
Amtech's
Concentration Risk [Line Items]
Cash Insured Limits	$ 9.7	$ 5.7
Accounts Receivable | Customer Concentration Risk | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	15.00%	12.00%