Leases - Summary of Operating Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Sep. 30, 2021
Assets:
Operating lease assets, net	$ 1,909	$ 3,453
Liabilities:
Current operating lease liabilities	953	1,415
Long-term operating lease liabilities	1,159	2,413
Total lease liabilities	$ 2,112	$ 3,828