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Stockholders' Equity (Details 3) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Warrants, Outstanding, Beginning Balance 2,219,543  
Number of Warrants, Granted 0  
Number of Warrants, Canceled 0  
Number of Warrants, Exercised (26,000)  
Number of Warrants, Expired/Forfeited 0  
Number of Warrants, Outstanding, Ending Balance 2,193,543 2,219,543
Weighted-Average Exercise Price, Outstanding, Beginning Balance $ 6.07  
Weighted-Average Exercise Price, Granted 0  
Weighted-Average Exercise Price, Canceled 0  
Weighted-Average Exercise Price, Exercised (0.01)  
Weighted-Average Exercise Price, Expired/Forfeited 0  
Weighted-Average Exercise Price, Outstanding, Ending Balance $ 6.14 $ 6.07
Weighted Average Remaining Contractual Life (in Years) 2 years 9 months 7 days 3 years 2 months 23 days
Aggregate Intrinsic Value, Outstanding $ 0 $ 3,168,000