Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Assets and Liabilities, Lessee [Abstract]
Operating lease other non-current asset	$ 15,435	$ 15,684
Total lease assets	15,435	15,684
Operating lease other current liabilities	2,890	2,633
Operating lease other non-current liability	17,625	18,368
Total lease liabilities	$ 20,515	$ 21,001