Commitments and Contingencies - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Commitments and Contingencies
Operating Lease, Weighted Average Discount Rate, Percent	9.90%		9.90%
Operating Lease, Cost	$ 50,000	$ 50,000	$ 151,000	$ 151,000
Operating Lease, Payments	$ 77,000	$ 75,000	231,000	224,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability			$ 0	$ 538,000
Operating Lease Expiration Year			2022