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, 2015
Dec. 31, 2014
Summary Of Significant Accounting Policies Details    
Expected term 6 years 3 months 18 days 6 years 3 months 18 days
Volatility   60.00%
Volatility, minimum 51.00%  
Volatility, maximum 58.00%  
Dividend yield 0.00% 0.00%
Risk-free interest rate Minimum 1.49%  
Risk-free interest rate Maximum 2.14%  
Risk-free interest rate   2.19%