The Company and Significant Accounting Policies - Reconciliation of Basic and Diluted Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss) attributable to common stockholders	$ 12,131	$ 7,864	$ 5,429	$ 9,016	$ 2,338	$ (35,592)	$ 25,424	$ (24,238)
Denominator:
Weighted average common shares outstanding, basic	85,390,333			84,185,728			85,207,992	84,208,924
Basic earnings per share:
Net income (loss) per share attributable to common stockholders	$ 0.14			$ 0.11			$ 0.30	$ (0.29)
Numerator:
Net income (loss) attributable to common stockholders	$ 12,131	$ 7,864	$ 5,429	$ 9,016	$ 2,338	$ (35,592)	$ 25,424	$ (24,238)
Denominator:
Weighted average common shares outstanding, basic	85,390,333			84,185,728			85,207,992	84,208,924
Dilutive securities:
Stock options and restricted stock units	2,925,399			677,292			2,486,403
Weighted average common shares outstanding, diluted	88,315,732			84,863,020			87,694,395	84,208,924
Diluted earnings per share:
Net income (loss) per share attributable to common stockholders	$ 0.14			$ 0.11			$ 0.29	$ (0.29)