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Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2015

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


	March 31, 2015		December 31, 2014
2010 Warrants	$	4,189	$	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 March 31, 2015 and December 31, 2014:


	March 31, 2015			December 31, 2014
2010 Warrants:
Expected term (in years)		0.61			0.86
Estimated volatility		58	%		55	%
Risk-free interest rate		0.14	%		0.25	%
Expected dividend yield		0	%		0	%