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Share-based Compensation (Details 1)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Risk free interest rate 1.45% 1.77% 1.52% 1.77%
Dividend yield 0.00% 0.00% 0.00% 0.00%
Expected term (in years) 7 years 7 years 7 years 7 years
Volatility 75.00% 105.00% 75.00% 105.00%