Income Tax - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Current taxes:
Federal	$ 0	$ (5)
State	0	(110)
Total current income tax benefit (expense)	0	(115)
Deferred taxes:
Federal	0	0
State	0	0
Total deferred income tax benefit (expense)	0	0
Total income tax benefit (expense)	$ 0	$ (115)