Stock Options Valuation Assumptions (Details)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Stock Options Valuation Assumptions Details
Expected term (in years)	10	10
Expected Volatility, Minimum	67.30%	80.50%
Expected Volatility, Maximum	78.90%	184.00%
Dividend yield	0.00%	0.00%
Risk-free interest rate, Minimum	1.13%	2.24%
Risk-free interest rate, Maximum	2.32%	2.32%

The estimated measure of the maximum 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.

No definition available.

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