Net (Loss) Income Per Share - Computation of Numerators and Denominators Used in Basic and Diluted Net (Loss) Income Per Share Amounts (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net (loss) income	$ (33,774)	$ 11,528	$ (13,648)	$ 14,360	$ (22,246)	$ 712
Interest expense related to Convertible Notes, net of tax	194		0		338	0
Numerator for diluted (loss) income per share	$ (33,580)		$ (13,648)		$ (21,908)	$ 712
Denominator:
Denominator for basic (loss) income per share- weighted average shares	78,948		75,263		79,204	74,959
Effect of dilutive securities, stock options, RSUs and ESPP shares	0		0		0	4,892
Denominator for dilutive (loss) income per share	78,948		75,263		79,204	79,851
Net (loss) income per share attributable to common stockholders, basic	$ (0.43)		$ (0.18)		$ (0.28)	$ 0.01
Net (loss) income per share attributable to common stockholders, diluted	$ (0.43)		$ (0.18)		$ (0.28)	$ 0.01