Leases - Supplemental Balance Sheet Information Schedule (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Assets:
Property, plant and equipment, net	$ 170	$ 202
Operating lease right-of-use assets, net	14,567	15,167
Total lease assets	14,737	15,369
Current liabilities:
Current maturities of long-term debt	64	61
Short-term operating lease liabilities	847	792
Non-current liabilities:
Long-term debt, net of current maturities	98	131
Long-term operating lease liabilities, net of short-term	14,203	14,786
Total lease liabilities	$ 15,212	$ 15,770
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	Current maturities of long-term debt
Noncurrent finance lease, liability, statement of financial position [Extensible List]	Total long-term debt	Total long-term debt