Warrant Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Series B Warrant Liability [Member]

Fair Value of Convertible Preferred Stock Warrant Liability

The Company used the following inputs:

	February 12, 2016		December 31, 2015
Volatility	90	%	90	%
Expected Term (years)	0.00		0.12
Expected dividend yield	—	%	—	%
Risk-free rate	0.65	%	0.65	%

Series C Warrant Liability [Member]

Fair Value of Convertible Preferred Stock Warrant Liability

The Company used the following inputs:

	December 31, 2016		December 31, 2015
Volatility	90	%	90	%
Expected Term (years)	3.17		4.17
Expected dividend yield	—	%	—	%
Risk-free rate	1.51	%	1.76	%