Annual report pursuant to section 13 and 15(d)

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

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2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
12 Months Ended
Dec. 31, 2012
Summary Of Significant Accounting Policies Tables  
Risk-free interest rate Minimum 0.97%
Risk-free interest rate Maximum 1.62%
Expected volatility Minimum 82.00%
Expected volatility Maximum 85.00%
Expected term of options in years 6 years 3 months
Expected dividend yield 0.00%