Income Taxes - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Tax provision	$ 31	$ 51
Increase (decrease) in valuation allowance	(34,822)	(34,822)
Valuation allowance	175,680	140,858
Valuation allowance to be allocated to additional paid-in capital when released	1,762
Valuation allowance to be released through continuing operations	173,918
Unrecognized tax benefits	680	685	$ 719
Unrecognized tax benefits that would impact effective tax rate	0
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
NOL carryforwards	638,507	485,351
NOL subject to expiration	89,051
NOL with an indefinite carryforward period	549,456
Domestic Tax Authority | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credits	3,733	3,733
Amount federal R&D credits will expire unused	3,733	3,733
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
NOL carryforwards	228,333	235,679
NOL subject to expiration	222,764
NOL with an indefinite carryforward period	5,569
State and Local Jurisdiction | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credits	$ 65	$ 65