Leases - Schedule of Financial Statement Classification of Lease Balances Within Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Leases [Abstract]
Operating lease assets	$ 6,016	$ 5,124
Finance lease assets	$ 20	$ 26
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant and Equipment - Net	Property, Plant and Equipment - Net
Total lease assets	$ 6,036	$ 5,150
Operating lease liabilities	$ 295	$ 113
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Finance lease liabilities	$ 9	$ 11
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities
Operating lease liabilities	$ 5,791	$ 5,048
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Lease Liability	Long-Term Lease Liability
Finance lease liabilities	$ 12	$ 16
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-Term Lease Liability	Long-Term Lease Liability
Total lease liabilities	$ 6,107	$ 5,188