Stockholders' Equity Common Stock - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Equity [Abstract]
Number of Shares, Beginning Balance	10,037,130
Number of Shares, Granted	3,603,744
Number of Shares, Exercised	(329,112)
Number of Shares, Forfeited	(1,794,573)
Number of Shares, Ending Balance	11,517,189	10,037,130
Number of Shares, Options exercisable	5,590,163
Weighted Average Exercise Price, Beginning Balance	$ 9.54
Weighted Average Exercise Price, Granted	19.30
Weighted Average Exercise Price, Exercised	3.84
Weighted Average Exercise Price, Forfeited	12.19
Weighted Average Exercise Price, Ending Balance	11.10	$ 9.54
Weighted Average Exercise Price, Options exercisable	$ 8.62
Weighted Average Remaining Contractual Term, Outstanding	7 years 5 months 1 day	7 years 10 months 13 days
Weighted Average Remaining Contractual Term, Options exercisable	6 years 1 month 2 days
Aggregate Intrinsic Value, Outstanding	$ 28,006,768	$ 156,627
Aggregate Intrinsic Value, Options exercisable	$ 16,670,723