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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average grant-date fair value of non-vested options outstanding.

No definition available.

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Number of share options (or share units) exercised during the current period.

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