Leases - Supplemental Balance Sheet Information Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
ASSETS
Property, plant and equipment, net	$ 147	$ 202
Operating lease right-of-use assets, net	14,380	15,167
Total lease assets	14,527	15,369
Current liabilities:
Current maturities of long-term debt	61	61
Short-term operating lease liabilities	869	792
Non-current liabilities:
Long-term debt, net of current maturities	81	131
Long-term operating lease liabilities, net of short-term	14,020	14,786
Total lease liabilities	$ 15,031	$ 15,770
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, plant and equipment, net	Property, plant and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current maturities of long-term debt	Current maturities of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Total long-term debt	Total long-term debt