Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Assets and Liabilities, Lessee [Abstract]
Operating lease other non-current asset	$ 13,643	$ 15,299
Total lease assets	13,643	15,299
Operating lease other current liabilities	3,431	3,196
Operating lease other non-current liability	14,793	16,978
Total lease liabilities	$ 18,224	$ 20,174