Stockholders' Equity (Details 1) - Stock options [Member] - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding, Beginning Balance	2,849,071
Options outstanding, Granted	20,000
Options outstanding, Exercised	(638,223)
Options outstanding, Forfeited	(300,000)
Shares outstanding, Ending Balance	1,930,848	2,849,071
Options outstanding, Vested and expected to vest	1,930,848
Weighted Average Exercise Price, Beginning Balance	$ 2.69
Weighted Average Exercise Price, Granted	11.26
Weighted Average Exercise Price, Exercised	1.76
Weighted Average Exercise Price, Forfeited	10.58
Weighted Average Exercise Price, Ending Balance	1.86	$ 2.69
Weighted Average Exercise Price, Vested and expected to vest	$ 1.86
Weighted Average Contractual Life (Years), Outstanding	2 years 7 months 6 days	3 years 8 months 12 days
Weighted Average Contractual Life (Years), Outstanding, Vested and expected to vest	2 years 7 months 6 days
Aggregate Intrinsic Value, Beginning Balance	$ 23,992,814
Aggregate Intrinsic Value, Ending Balance	15,005,774	$ 23,992,814
Aggregate Intrinsic Value, Vested and expected to vest	$ 15,005,774
Exercisable, Beginning Balance
Exercisable, Vested	638,223
Exercisable, Exercised	(638,223)
Exercisable, Forfeited
Exercisable, Ending Balance
Weighted Average Exercise Price, Exercisable, Beginning Balance
Weighted Average Exercise Price, Vested	1.76
Weighted Average Exercise Price, Exercised	1.76
Weighted Average Exercise Price, Exercisable, Ending Balance