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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

No definition available.

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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