Leases - Summary of Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Assets:
Operating lease assets, net	$ 1,567	$ 2,179
Liabilities:
Current operating lease liabilities	839	1,777
Long-term operating lease liabilities	741	545
Total lease liabilities	$ 1,580	$ 2,322