Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lease, Cost [Abstract]
Operating lease costs	$ 2,468	$ 1,932	$ 7,028	$ 5,375
Amortization of assets	18	182	147	743
Interest on lease liabilities		10	5	33
Total finance lease costs	18	192	152	776
Variable lease cost	783	382	2,056	1,246
Short-term lease costs	640	56	1,357	145
Total lease costs	$ 3,909	$ 2,562	$ 10,593	$ 7,542