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Summary of Significant Accounting Policies (Details 2)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair value of each share-based payment is estimated on the following assumptions    
Risk-free interest rate 2.07% 3.40%
Expected volatility 49.42% 60.13%
Dividend yield 0.00% 0.00%
Expected term 6 years 6 months 5 years 6 months