Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Assumption to Calculate Weighted Average Grant Date Fair Value of Options Grant (Details)

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Stockholders' Equity - Schedule of Assumption to Calculate Weighted Average Grant Date Fair Value of Options Grant (Details) - Common Stock - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Class Of Stock [Line Items]    
Grant date fair value of options vested $ 1,240,805 $ 1,428,468
Intrinsic value of options exercised $ 1,472,506 $ 30,000