Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Current:
State and local	$ (32)	$ (71)	$ (94)	$ (170)
Income tax expense	$ (32)	$ (71)	$ (94)	$ (170)