Leases - Supplemental Balance Sheet Information Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Assets:
Property, plant and equipment, net	$ 135	$ 147
Operating lease right-of-use assets, net	14,152	14,380
Total lease assets	14,287	14,527
Current liabilities:
Current maturities of long-term debt	62	61
Short-term operating lease liabilities	884	869
Non-current liabilities:
Long-term debt, net of current maturities	70	81
Long-term operating lease liabilities, net of short-term	13,799	14,020
Total lease liabilities	$ 14,815	$ 15,031
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