Share based compensation - Fair Value Assumptions (Details) - company |
3 Months Ended | |
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Mar. 31, 2016 |
Mar. 31, 2015 |
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| Assumptions used to estimate the fair values of the share options granted using the Black-Scholes option-pricing model | ||
| Expected term | 5 years | 5 years |
| Expected volatility (as a percent) | 68.00% | 60.00% |
| Risk free rate (as a percent) | 1.07% | 1.09% |
| Expected dividend yield (as a percent) | 0.00% | 0.00% |
| Number of companies with similar public securities, considered for expected volatility rate computation | 7 | |
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- Definition Represents information pertaining to the number of companies with similar public securities considered by the company for computation of expected volatility rate. No definition available.
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- References No definition available.
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Expected term of share-based compensation awards, 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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