Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders’ Equity

Schedule of stock option activity

				Weighted
		Weighted		average	Aggregate
	Number	average		contractual	intrinsic
	of shares	exercise price		term	value
Outstanding at December 31, 2015	998,198	$	3.94
Granted	762,372		8.02
Outstanding at June 30, 2016	1,760,570	$	5.71	9.0	$	3,228,352
Vested and expected to vest at June 30, 2016	1,754,401	$	5.72	9.0	$	3,189,857
Exercisable at June 30, 2016	659,668	$	2.86	8.1	$	3,089,659

Schedule of stock-based compensation expense

	Three months ended June 30,				Six months ended June 30,
	2016		2015		2016		2015
Research and development	$	227,194	$	151,160	$	767,941	$	194,979
General and administrative		254,839		34,253		370,284		65,194
	$	482,033	$	185,413	$	1,138,225	$	260,173