Stock-based Compensation Expense - Schedule of Company's Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Number of Shares Subject to Options
Beginning balance (in shares)	40,159
Granted (in shares)	0
Cancelled, forfeited, and expired (in shares)	(77)
Exercised (in shares)	(2,594)
Ending balance (in shares)	37,488	40,159
Exercisable (in shares)	36,132
Vested and expected to vest (in shares)	37,488
Weighted-Average Exercise Price (per Option)
Beginning balance, weighted average exercise price (in dollars per share)	$ 2.98
Granted, weighted average exercise price (in dollars per share)	0
Cancelled, forfeited, and expired, weighted average exercise price (in dollars per share)	4.97
Exercised, weighted average exercise price (in dollars per share)	3.01
Ending balance, weighted average exercise price (in dollars per share)	2.98	$ 2.98
Exercisable, weighted average exercise price (in dollars per share)	2.90
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 2.98
Weighted-Average Remaining Contractual Term (Years)	4 years 11 months 1 day	5 years 1 month 28 days
Exercisable, weighted-average remaining contractual term	4 years 10 months 9 days
Vested and expected to vest, weighted-average remaining contractual term	4 years 11 months 1 day
Aggregate Intrinsic Value	$ 1,319,654	$ 1,716,171
Exercisable, aggregate intrinsic value	1,274,719
Vested and expected to vest, aggregate intrinsic value	$ 1,319,654