Warrants (Tables)

12 Months Ended

Dec. 31, 2014

Assumptions Used in Binomial and Monte Carlo Valuation Model

The following pricing assumptions were used in the Binomial/Monte Carlo valuation model at December 31, 2013 and 2012:

	December 31, 2013			December 31, 2012
Risk-free interest rate		0.13	%		0.25	%
Expected life in years		0.94			1.94
Expected volatility		80	%		70	%
Expected dividend yield		0			0