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Stockholders' Equity (Details 1) - Employee Stock Option [Member]
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life 6 years 3 months 5 years 9 months 22 days
Weighted average volatility 73.00% 72.00%
Forfeiture rate 12.00% 11.00%
Weighted average risk-free interest rate 1.56% 1.45%
Expected dividend rate 0.00% 0.00%