Warrant Liability (Tables)

12 Months Ended

Dec. 31, 2015

Warrant Liability [Abstract]

Summary of assumptions used in connection with the valuation of warrants issued

	Initial Measurement June 25, 2013			December 31, 2013			December  31, 2014			Exercised During 2015		December 31, 2015
Number of shares underlying the warrants		5,416,851			5,309,438			4,723,357			1,686,429		3,036,925
Exercise price	$	1.65		$	1.65		$	0.61		$	0.61	$	0.51
Volatility		140	%		135	%		128	%		117-119%		98	%
Risk-free interest rate		1.49	%		1.75	%		1.38	%		.81-1.06%		1.19	%
Expected dividend yield		0			0			0			0		0
Expected warrant life (years)		5.0			4.5			3.5			3.01-3.33		2.48
Stock price	$	0.96		$	1.80		$	0.98		$	1.69-$2.22	$	1.13

Summary of fair value measurements using significant unobservable inputs (Level 3)

	December 31, 2014		Decrease from Warrants Exercised in 2015			Increase in Fair Value		December 31, 2015
Warrant liability	$	3,789,562	$	(2,557,331	)	$	1,201,870	$	2,434,101