Leases - Supplemental Balance Sheet Information Schedule (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Assets:
Property, plant and equipment, net	$ 106	$ 4
Operating lease right-of-use assets, net	12,784	13,326
Total lease assets	12,890	13,330
Current liabilities:
Current maturities of long-term debt	46	0
Short-term operating lease liabilities	941	879
Non-current liabilities:
Long-term debt, net of current maturities	62	0
Long-term operating lease liabilities, net of short-term	12,476	13,035
Total lease liabilities	$ 13,525	$ 13,914
Finance lease, asset, statement of financial position [Extensible List]	Property, plant and equipment, net	Property, plant and equipment, net
Current finance lease, liability, statement of financial position [Extensible List]	Current maturities of long-term debt, net of unamortized debt issuance costs	Current maturities of long-term debt, net of unamortized debt issuance costs
Noncurrent finance lease, liability, statement of financial position [Extensible List]	Long-term debt, net of current maturities	Long-term debt, net of current maturities