Summary of Significant Accounting Policies - Narrative (Details) - Employee Retention Credit Program - USD ($)	3 Months Ended	9 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross benefit	$ 0	$ 3,373,000	$ 0	$ 3,373,000
Expense	$ 0		$ 0
Employee retention credit refund		2,859,000		2,859,000
Interest income		514,000		514,000
Decrease to COGS		2,406,000		2,406,000
Decrease to SG&A		453,000		453,000
Decrease to (income) expense, net		514,000		514,000
Professional fees		$ 675,000		$ 675,000

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