Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current Federal, State and Local, Tax Expense (Benefit) [Abstract]
Federal	$ 0	$ 0	$ 0
State and local	10	10	11
Total Current Income Tax Expense	10	10	11
Deferred Federal, State and Local, Tax Expense (Benefit) [Abstract]
Federal	0	0	0
State and local	0	0	0
Income tax expense	$ 10	$ 10	$ 11