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Income Per Share - Schedule of Option to Purchase of Common Stock Excluded from Diluted Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Earnings per share [abstract]
Net income (loss) attributable to owners of the Company	$ (5,145)	$ 3,822
Weighted average number of common shares outstanding (thousands)	44,357	39,144
Share options (thousands)		$ 1,164
Adjustments to net income per share		$ 61
Weighted average number of common shares outstanding for diluted income per share (thousands)	44,357	40,308
Diluted income (loss) per share	$ (0.11)	$ 0.10

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- Definition

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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- Definition

The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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Adjustments to net income due to share based payment options.

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Adjustments to net income per share.

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Weighted average shares diluted.

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