STOCK-BASED COMPENSATION (Details 1) |
6 Months Ended | |
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Jun. 30, 2018 |
Jun. 30, 2017 |
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| Expected dividend yield | 0.00% | 0.00% |
| Minimum [Member] | ||
| Risk-free interest rate | 2.54% | 1.77% |
| Expected term of option | 4 years 6 months | 5 years |
| Expected stock price volatility | 99.65% | 76.61% |
| Maximum [Member] | ||
| Risk-free interest rate | 2.81% | 2.29% |
| Expected term of option | 7 years | 7 years 10 months 28 days |
| Expected stock price volatility | 102.00% | 77.36% |
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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://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average expected volatility rate of share-based compensation awards. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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