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Stockholders' Equity (Details 1)
6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Stockholders' Equity [Abstract]      
Risk-free interest rate 2.00% 2.00% 2.00%
Dividend yield 0.00% 0.00% 0.00%
Expected volatility 47.00% 47.00% 49.00%
Expected life 6 years 6 years 6 years