Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Current:
Federal		$ (4)		$ (4)
State	$ (119)	27	$ (581)	50
Total Current	(119)	23	(581)	46
Deferred:
Federal	135	(1,188)	(2)	(3,079)
State	3	(205)	396	25
Total Deferred	138	(1,393)	394	(3,054)
Provision (benefit) for income taxes	$ 19	$ (1,370)	$ (187)	$ (3,008)