Income Taxes - Summary of Changes in Valuation Allowance for Deferred Tax Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Valuation allowance as of beginning of year	$ (75,039)	$ (51,980)
Decreases recorded as benefit to income tax provision	0	0
Increases recorded to income tax provision	(27,405)	(23,059)
Valuation allowance as of end of year	$ (102,444)	$ (75,039)