Stock-based Compensation Expense - Schedule of Company's Stock Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares
Number of Shares Subject to Options
Beginning balance (in shares) | shares	51,591
Granted (in shares) | shares	0
Cancelled, forfeited, and expired (in shares) | shares	(667)
Exercised (in shares) | shares	(7,618)
Ending balance (in shares) | shares	43,306	51,591
Exercisable (in shares) | shares	39,231
Vested and expected to vest (in shares) | shares	43,306
Weighted-Average Exercise Price (per Option)
Beginning balance, weighted average exercise price (in dollars per share) | $ / shares	$ 2.85
Granted, weighted average exercise price (in dollars per share) | $ / shares	0
Cancelled, forfeited, and expired, weighted average exercise price (in dollars per share) | $ / shares	4.56
Exercised, weighted average exercise price (in dollars per share) | $ / shares	2.32
Ending balance, weighted average exercise price (in dollars per share) | $ / shares	2.92	$ 2.85
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	2.73
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares	$ 2.92
Weighted-Average Remaining Contractual Term (Years)	5 years 3 months 18 days	6 years
Exercisable, weighted-average remaining contractual term	5 years 1 month 28 days
Vested and expected to vest, weighted-average remaining contractual term	5 years 3 months 18 days
Aggregate Intrinsic Value | $	$ 1,127,749	$ 1,321,183
Exercisable, aggregate intrinsic value | $	1,029,013
Vested and expected to vest, aggregate intrinsic value | $	$ 1,127,749