Stock Options (Tables)

9 Months Ended

Sep. 30, 2017

The weighted average of assumptions used principally in determining the fair value of options granted to employees and non-employees were as follows:

A summary of option activity for the nine months ended September 30, 2017 and is presented below:

Options	Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Term in Years		Aggregate Intrinsic Value
Outstanding at December 31, 2016		6,610,179		$	2.54
Granted		1,423,000			8.42
Exercised		(239,817	)		0.42
Forfeited		(68,583	)		6.62
Outstanding at September 30, 2017		7,724,779		$	3.66		7.93	$	29,985,612
Vested at September 30, 2017		4,055,877		$	1.61		7.16	$	22,466,228