Basis of Presentation and Significant Accounting Policies - Concentrations of Credit Risk - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2025	Sep. 30, 2024
Concentration Risk [Line Items]
Percentage of cash balances		67.00%	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]	U S Treasuries And F D I C Insured [Member]
Amtech's
Concentration Risk [Line Items]
Cash Insured Limits	$ 9.1	$ 9.1	$ 5.7
Accounts Receivable | Customer Concentration Risk | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%		12.00%