Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Summary of Warrants Liability and Remeasured Liability to Estimated Fair Value

The Company classified the warrants as a liability and remeasured the liability to the estimated fair value at December 31, 2017 using the Black Scholes option pricing model with the following assumptions: 

	December 31, 2017
Risk-free interest rate	2.09%
Expected volatility	100.39%
Expected term	4.08 years
Expected dividend yield	0.0%

Summary of Reconciliation of Warrant Liability Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs

The following table presents a reconciliation of the Company’s warrant liability measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the three months ended March 31, 2018 and 2017:

	March 31,
	2018			2017
Beginning balance of warrant liability	$	3,701,277		$	4,095,019
Change in fair value upon re-measurement		(433,392	)		3,072,747
Reclassification to Additional Paid-in Capital due to warrant exercise	—				(1,399,091	)
Reclassification to Additional Paid-in Capital due to warrant amendment		(3,267,885	)	—
Ending balance of warrant liability	$	—		$	5,768,675