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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2015

The fair value of the 2010 warrants at June 30, 2015 and December 31, 2014, consisted of the following (in thousands):


	June 30, 2015		December 31, 2014
2010 Warrants	$	3,978	$	10,485

Fair Value Assumptions of Warrants

The fair value of the Company’s warrants was based on an option valuation model using the following assumptions at June 30, 2015 and December 31, 2014:


	June 30, 2015			December 31, 2014
2010 Warrants:
Expected term (in years)		0.36			0.86
Estimated volatility		52	%		55	%
Risk-free interest rate		0.01	%		0.25	%
Expected dividend yield		0	%		0	%