Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Operating lease, weighted average discount rate	10.00%		10.00%
Operating lease, weighted average remaining lease term	2 years 6 months		2 years 6 months
Operating lease liability	$ 1,790		$ 1,790		$ 2,342
Operating Lease, Liability, Statement of Financial Position [Extensible List]	us-gaap:AccruedLiabilitiesAndOtherLiabilities		us-gaap:AccruedLiabilitiesAndOtherLiabilities		us-gaap:AccruedLiabilitiesAndOtherLiabilities
Lease cost	$ 444	$ 486	$ 1,303	$ 1,296
Operating cash outflows from operating leases	$ 341	$ 340	$ 1,021	$ 1,021