Changes in Stock Options Outstanding (Detail) - USD ($) |
6 Months Ended | |
|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
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| Number of Option Shares | ||
| Stock Options, Beginning Balance | 3,447,969 | |
| Stock Options, Granted | 649,000 | |
| Stock Options, Exercised | 0 | 0 |
| Stock Options, Ending Balance | 4,096,969 | |
| Stock Options, Exercisable at June 30, 2015 | 3,147,731 | |
| Weighted Average Exercise Price | ||
| Weighted Average Exercise Price, Beginning Balance | $ 5.00 | |
| Weighted Average Exercise Price, Granted | 3.09 | |
| Weighted Average Exercise Price, Ending Balance | 4.70 | |
| Weighted Average Exercise Price, Exercisable at June 30, 2015 | $ 5.16 | |
| Weighted Average Contractual Life | ||
| Weighted Average Contractual Life, Ending balance | 6 years 2 months 19 days | |
| Weighted Average Contractual Life, Exercisable at June 30, 2015 | 5 years 3 months 22 days | |
| Aggregate Intrinsic Value | ||
| Aggregate Intrinsic Value, Option Outstanding | $ 2,876,323 | |
| Aggregate Intrinsic Value, Option Exercisable | $ 2,122,856 | |
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- Definition Share-based compensation arrangement by share-based payment award, options, aggregate intrinsic value. No definition available.
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- References No definition available.
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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 Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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