Summary of Stock Option Activity (Detail) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Number of Options | ||
| Number of Options, Beginning balance | 14,584 | 22,022 |
| Number of Options, Exercised | (14,584) | (7,438) |
| Number of Options, Ending balance | 14,584 | |
| Number of Options, Vested at December 31 | 14,584 | |
| Weighted Average Exercise Price | ||
| Weighted Average Exercise Price, Beginning balance | $ 7.63 | $ 7.63 |
| Weighted Average Exercise Price, Exercised | $ 7.63 | 7.63 |
| Weighted Average Exercise Price, Ending balance | 7.63 | |
| Weighted Average Exercise Price, Vested options | $ 7.63 | |
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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