Stockholders’ Equity (Tables)

3 Months Ended

Mar. 31, 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
Outstanding at March 31, 2016	998,198	$	3.94	8.6	$	4,654,324
Vested and expected to vest at March 31, 2016	992,029	$	3.95	8.6	$	4,609,291
Exercisable at March 31, 2016	592,194	$	2.42	8.2	$	3,662,355

Schedule of stock-based compensation expense

	Three months ended March 31,
	2016		2015
Research and development	$	540,747	$	43,819
General and administrative		115,445		30,941
	$	656,192	$	74,760