Income Taxes, Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets [Abstract]
Operating loss carryforwards	$ 61,427	$ 53,119
Tax credit carryforwards	6,476	3,558
Other temporary differences	10,533	9,168
Deferred tax assets, gross	78,436	65,845
Less valuation allowance	(78,436)	(65,845)
Net deferred tax asset	$ 0	$ 0