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Income (Loss) Per Share - Basic And Diluted Net Income (loss) Per Ordinary Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net (loss) income	$ 520	$ (704)	$ 4,591	$ 9,509
Denominator:
Weighted average number of common shares - Basic	58,536	48,845	55,946	48,650
Effect of dilutive securities- share-based employee options and awards	1,904		1,832	1,801
Weighted average number of common shares - Diluted	60,440	48,845	57,778	50,451
Antidilutive options and awards	865	310	865	310
Net (loss) income per ordinary share:
Basic	$ 0.01	$ (0.01)	$ 0.08	$ 0.20
Diluted	$ 0.01	$ (0.01)	$ 0.08	$ 0.19

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