Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Federal and state operating loss carryforwards	$ 258,836	$ 242,584
Equity compensation	25,413	26,243
Capitalized research and development	37,998	26,480
R&D tax credits, net of reserves	18,887	18,887
Disallowed interest	43,239	29,979
Temporary differences	12,362	8,340
Total deferred tax assets	396,735	352,513
Deferred tax liabilities:
Other	(1,154)	(400)
Total deferred tax liabilities	(1,154)	(400)
Valuation allowance	(395,581)	(352,113)
Net deferred tax assets	$ 0	$ 0