Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Right-of-use operating lease costs	$ 67	$ 38	$ 178	$ 113
Short-term lease costs	52	78	192	229
Total	$ 119	$ 116	$ 370	$ 342