Stockholders' Equity - Summary of Stock Option Activity under its Stock Plans (Detail)	6 Months Ended
	Jun. 30, 2022 USD ($) $ / shares shares
Share-based Payment Arrangement [Abstract]
Shares Available for Grant, Outstanding Beginning Balance	5,641,782
Available for Grant, Shares authorized	2,098,105	[1]
Shares Available for Grant, Forfeited and expired	256,874
Shares Available for Grant, Outstanding Ending Balance	3,800,551
Shares, Options Outstanding, Beginning Balance	6,767,895
Shares, Options Outstanding, Granted	1,402,398	[1]
Shares, Options Outstanding, Exercised	(693,988)	[2]
Shares, Options Outstanding, Forfeited and expired	(256,874)
Shares, Options Outstanding, Ending Balance	7,219,431
Shares, Vested and expected to vest, net of estimated forfeiture at June 30, 2022	6,904,798
Shares, Exercisable at June 30, 2022	4,733,359
Weighted Average Exercise Price, Options Outstanding, Beginning Balance | $ / shares	$ 19.14
Weighted Average Exercise Price, Options Outstanding, Granted | $ / shares	27.94	[1]
Weighted Average Exercise Price, Options Outstanding, Exercised | $ / shares	10.47	[2]
Weighted Average Exercise Price, Options Outstanding, Forfeited and expired | $ / shares	43.56
Weighted Average Exercise Price, Options Outstanding, Ending Balance | $ / shares	20.81
Weighted Average Exercise Price, Vested and expected to vest, net of estimated forfeiture at June 30, 2022 | $ / shares	20.25
Weighted Average Exercise Price, Exercisable at June 30, 2022 | $ / shares	$ 14.10
Options Outstanding, Weighted Average Remaining Contractual Term	6 years 29 days
Weighted Average Remaining Contractual Term, Vested and expected to vest, net of estimated forfeiture at June 30, 2022	5 years 11 months 8 days
Weighted Average Remaining Contractual Term, Exercisable at June 30, 2022	4 years 6 months 29 days
Aggregate Intrinsic Value, Outstanding, Ending Balance | $	$ 72,849,218
Aggregate Intrinsic Value, Vested and expected to vest, net of estimated forfeiture at June 30, 2022 | $	72,382,158
Aggregate Intrinsic Value, Exercisable at June 30, 2022 | $	$ 67,465,870

[1] The difference between shares granted in the number of shares available for grant and outstanding options represents the RSUs and RSAs granted for the period with a 1.5 share ratio reduction to the reserve shares for each RSU or RSA grant in accordance with the amended and restated 2012 Equity Incentive Award Plan.

[2] Shares presented as available for grant represents shares repurchased for tax withholding upon vesting of RSUs.