Stockholders' Equity - Summary of Stock Option Activity (Detail) - Options to purchase common stock - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Outstanding Options
Beginning balance (in shares)	7,892,857	8,222,710
Granted (in shares)	0	0
Exercised (in shares)	(1,412,226)	(171,118)
Forfeited / canceled (in shares)	(9,569)	(158,735)
Ending balance (in shares)	6,471,062	7,892,857	8,222,710
Vested and expected to vest (in shares)	6,471,062
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 0.19	$ 0.19
Granted (in dollars per share)	0	0
Exercised (in dollars per share)	0.28	0.42
Forfeited / canceled (in dollars per share)	0.63	0.14
Ending balance (in dollars per share)	$ 0.17	$ 0.19	$ 0.19
Weighted Average Remaining Contractual Life (in years)
Weighted Average Remaining Contractual Life (in years)	7 years 3 months 14 days	7 years 3 months 21 days	8 years 3 months 18 days