Warrant Liabilities (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Fair Value of Convertible Preferred Stock Warrant Liability

The Company has calculated the fair value of the Series C Warrants using a Black-Scholes pricing model, which requires the input of highly subjective assumptions including the expected stock price volatility. The Company used the following inputs:

	March 31, 2017		December 31, 2016
Volatility	90	%	90	%
Expected Term (years)	2.92		3.17
Expected dividend yield	—	%	—	%
Risk-free rate	1.48	%	1.51	%