XML 45 R21.htm IDEA: XBRL DOCUMENT

FAIR VALUE OF EACH OPTION GRANT (Details)	3 Months Ended
FAIR VALUE OF EACH OPTION GRANT (Details)	Mar. 31, 2014	Mar. 31, 2013
Fair Value Of Each Option Grant Details
Risk-free interest rate	89.00%	54.00%
Expected lives	3 years 4 months	3 years 4 months
Expected volatility	43.00%	52.00%
Expected dividend yield	0.00%	0.00%

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.

+ References+ Details