Income Taxes - Statutory Federal Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation at federal statutory income tax rate, amount	$ (35)	$ (195)	$ (73)
State and local taxes, net of federal benefit	0	(77)	(10)
Other	(1,258)	(1,312)	(1,296)
Benefit (provision) for income taxes	$ (1,293)	$ (1,584)	$ (1,379)
Effective income tax rate reconciliation, at federal statutory income tax rate (in percent)	21.00%	21.00%	21.00%