XML 38 R61.htm IDEA: XBRL DOCUMENT

Share-based Compensation Valuation Assumptions (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 1.78	$ 2.62
Stock Options [Member]
Expected Dividend Yield	0.00%	0.00%
Risk Free Interest Rate	0.71%	1.76%
Expected Option Life	5 years 1 month 6 days	5 years 1 month 2 days
Expected Volatility Factor	93.30%	78.00%

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