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Stockholders' Equity (Details 1) - Stock Option [Member]
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 2.00% 2.00% 1.60%
Dividend yield 0.00% 0.00% 0.00%
Expected volatility 47.00% 49.00% 49.00%
Expected life 6 years 6 years 6 years