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Stockholders' Equity (Details 1) - Employee Stock Option [Member]
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life 5 years 9 months 22 days 6 years 3 months
Weighted average volatility 72.00% 74.00%
Forfeiture rate 11.00% 13.00%
Weighted average risk-free interest rate 1.45% 1.93%
Expected dividend rate 0.00% 0.00%