Income Taxes - Schedule of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Unrecognized tax benefit beginning balance	$ 17
Increases for tax positions taken in prior years		$ 2
Increases for tax positions taken in current years		15
Unrecognized tax benefit ending balance	$ 17	$ 17