Income Taxes - Income Tax (Benefit) Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current
U.S. Federal	$ 0	$ 0	$ 0
State	14	37	21
Foreign	0	0	0
Total current expense	14	37	21
Deferred
U.S. Federal	0	0	0
State	0	0	0
Foreign	0	0	0
Total deferred expense	0	0	0
Total provision for income taxes	$ 14	$ 37	$ 21