Summary of Significant Accounting Policies - Recent Accounting Pronouncement (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Oct. 01, 2019	Sep. 30, 2019
Assets:
Operating lease right-of-use assets	$ 2,014	$ 2,448
Liabilities:
Accounts payable and accrued expenses	8,523		$ 16,175
Operating lease liabilities - noncurrent portion	$ 1,390	$ 1,783
Accounting Standards Update 2016-02
Assets:
Operating lease right-of-use assets			2,448
Liabilities:
Accounts payable and accrued expenses			16,840
Operating lease liabilities - noncurrent portion			1,783
As Reported | Accounting Standards Update 2016-02
Liabilities:
Accounts payable and accrued expenses			16,175
Restatement Adjustment | Accounting Standards Update 2016-02
Assets:
Operating lease right-of-use assets			2,448
Liabilities:
Accounts payable and accrued expenses			665
Operating lease liabilities - noncurrent portion			$ 1,783