Stockholders' Equity (Details) |
12 Months Ended |
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Dec. 31, 2017
$ / shares
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| Exercise Price | $ 5.73 |
| Maximum [Member] | |
| Risk-free interest rate | 2.38% |
| Expected term in years | 10 years |
| Expected volatility | 96.65% |
| Minimum [Member] | |
| Risk-free interest rate | 1.81% |
| Expected term in years | 5 years 6 months |
| Expected volatility | 77.30% |
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. No definition available.
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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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