Income Taxes - Benefit (Provision) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income tax benefit (provision):
Federal	$ 36,067	$ 17,484	$ 18,513
State	13,691	9,606	7,082
Expiration of NOLs and R&D credit	(15,141)	(16,862)	(14,210)
Income tax benefit (provision) before valuation allowance	34,617	10,228	11,385
Deferred tax valuation allowance	$ (34,617)	$ (10,228)	(11,158)
Income tax benefit (provision)			$ 227