Convertible Preferred Stock Warrants (Tables)

6 Months Ended

Jun. 30, 2014

Equity [Abstract]

Assumptions Used to Value Convertible Preferred Stock Warrants

The assumptions used to value the convertible preferred stock warrants were as follows:

	December 31,
	2013
Expected term (in years)		1.1
Expected volatility		75.00	%
Risk-free interest rate		0.13	%
Dividend yield		0	%