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Options and restricted stock transactions (Details) (USD $)
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Dec. 31, 2013
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| Options and restricted stock transactions | |
| Options and restricted stock eligible for grant | 2,327,500 |
| Unrecognized compensation cost related to stock options | $ 5,250,009 |
| Compensation cost related to stock options recognized over a weighted average period of years | 2.60 |
| The aggregate intrinsic value of options vested and expected to vest | 20,359,425 |
| The aggregate intrinsic value of options exercisable | $ 3,890,000 |
| The year end intrinsic values are based on a closing price | $ 12.20 |
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- Definition
Compensation cost related to stock options recognized over a weighted average period of years No definition available.
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- Definition
Options and restricted stock eligible for grant No definition available.
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- Details
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- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. No definition available.
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- Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. No definition available.
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- Definition
The year end intrinsic values are based on a closing price No definition available.
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- Definition
Unrecognized compensation cost related to stock options No definition available.
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