Schedule of Information about Unvested Options (Detail)	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Unvested options, Shares, beginning balance | shares	5,716,060
Granted, Shares | shares	2,401,402
Vested, Shares | shares	(2,218,647)
Cancelled, Shares | shares	(339,996)
Unvested options, Shares, ending balance | shares	5,558,819
Unvested options, Weighted Average Grant Date Fair Value, beginning balance | $ / shares	$ 22.74
Granted, Weighted Average Grant Date Fair Value | $ / shares	39.66
Vested, Weighted Average Grant Date Fair Value | $ / shares	24.61
Cancelled, Weighted Average Grant Date Fair Value | $ / shares	28.70
Unvested options, Weighted Average Grant Date Fair Value, ending balance | $ / shares	$ 28.93