Commitments and Contingencies - Additional Information (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Lease, Weighted Average Discount Rate, Percent		9.90%		9.90%
Operating Lease, Cost		$ 50,000	$ 50,000	$ 101,000	$ 101,000
Operating Lease, Payments		$ 77,000	$ 75,000	154,000	149,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability				$ 0	$ 538,000
Operating Lease Expiration Year				2022
ASU 2016-02
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 538,000