Income Taxes - 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	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Benefit from income taxes	$ 2	$ 0	$ 2	$ 0
Deferred tax assets, operating loss carryforwards, portion available after application of IRC Section 382 limitations					$ 54,500
Operating loss carry-forwards					8,300	$ 8,700
Operating loss, subject to expiration					37,300
U.S. Federal, State and Local tax authorities
Operating Loss Carryforwards [Line Items]
Deferred tax assets, operating loss carry-forwards					108,800
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Deferred tax assets, operating loss carry-forwards					$ 64,500