Commitments and Contingencies - Additional Information (Details) - USD ($)		3 Months Ended	9 Months Ended		12 Months Ended
	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019
Operating Lease, Weighted Average Discount Rate, Percent		9.90%	9.90%
Operating Lease, Cost		$ 50,000	$ 151,000
Operating Lease, Payments		$ 75,000	224,000
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability			$ 538,000	$ 0	$ 0
Operating Lease Expiration Year			2022
ASU 2016-02
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 538,000