Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Lease, Cost [Abstract]
Operating lease costs	$ 2,389	$ 1,740	$ 4,560	$ 3,444
Amortization of assets	54	250	129	561
Interest on lease liabilities	2	6	5	23
Total finance lease costs	56	256	134	584
Variable lease cost	755	457	1,272	863
Short-term lease costs	364	50	718	89
Total lease costs	$ 3,564	$ 2,503	$ 6,684	$ 4,980