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STOCK OPTION PLANS (Details)	12 Months Ended
STOCK OPTION PLANS (Details)	Dec. 31, 2012	Dec. 31, 2011
Risk-free interest rate, Minimum	0.83%	1.16%
Risk-free interest rate, Maximum	1.10%	2.46%
Expected dividend yield	0.00%	0.00%
Expected stock price volatility	75.00%	75.00%
Expected life of options	5 years 9 months	5 years 9 months

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.

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