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Income (Loss) Per Share - Summary of Basic and Diluted Net Income (Loss) per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss)	$ 745	$ 520	$ (11,154)	$ 4,591
Denominator:
Weighted average number of common shares - basic	84,823	58,536	80,671	55,946
Effect of dilutive securities- share-based employee options and awards	2,087	1,904		1,832
Weighted average number of common shares - diluted	86,910	60,440	80,671	57,778
Antidilutive options and awards	999	865	389	865
Net income (loss) per ordinary share:
Basic	$ 0.01	$ 0.01	$ (0.14)	$ 0.08
Diluted	$ 0.01	$ 0.01	$ (0.14)	$ 0.08

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