Stockholder's Equity (Tables)

12 Months Ended

Dec. 31, 2014

Warrants to purchase an aggregate of 4,823,766 shares of the Company’s common stock were outstanding and exercisable as of December 31, 2014:

Issue Date	Number of Underlying Shares of Common Stock	Per Share Exercise Price		Expiration Date
February 19, 2010	3,000	$	165.00	February 19, 2015
March 24, 2010	2,500	30.00		March 24, 2015
March 24, 2010	500	165.00		March 24, 2015
March 29, 2010	2,500	165.00		March 29, 2015
May 26, 2010	666	200.00		May 26, 2015
June 18, 2010	5,834	200.00		June 18, 2015
July 26, 2010	20,000	30.00		July 26, 2015
July 26, 2010	700	100.00		July 26, 2015
October 25, 2010	473	200.00		October 25, 2015
November 4, 2010	113	200.00		November 4, 2015
November 22, 2010	1,656	100.00		November 22, 2015
November 25, 2010	500	100.00		November 25, 2015
December 23, 2010	3,750	100.00		December 23, 2015
February 2, 2011	2,000	100.00		February 2, 2016
February 23, 2011	1,500	100.00		February 23, 2016
March 15, 2011	1,200	100.00		March 15, 2016
April 6, 2011	2,000	100.00		April 6, 2016
April 15, 2011	1,200	100.00		April 15, 2016
April 26, 2011	2,500	100.00		April 26, 2016
April 29, 2011	3,000	100.00		April 29, 2016
June 26, 2011	104,057	65.00		June 26, 2016
June 26, 2011	52,028	100.00		June 26, 2016
July 1, 2011	5,300	65.00		July 1, 2016
May 23, 2012	30,000	30.00		May 23, 2017
July 1, 2012	10,000	75.00		July 1, 2017
August 20, 2012	90,000	38.00		August 20, 2017
March 27, 2013	173,917	3.00		March 27, 2018
March 17, 2014	15,000	4.90		March 17, 2019
April 29, 2014	832,950	4.80		April 29, 2018
April 29, 2014	277,650	4.80		April 29, 2018
April 29, 2014	35,000	4.80		April 29, 2018
April 29, 2014	351,060	2.00		April 29, 2018
May 6, 2014	1,025,438	4.80		May 6, 2018
May 6, 2014	341,813	4.80		May 6, 2018
May 21, 2014	261,693	4.80		May 21, 2018
May 21, 2014	89,731	4.80		May 21, 2018
June 13, 2014	533,625	4.80		June 13, 2018
June 13, 2014	177,875	4.80		June 13, 2018
June 13, 2014	16,037	4.80		June 13, 2018
July 10, 2014	15,000	4.80		July 10, 2018
July 10, 2014	5,000	4.80		July 10, 2018
October 21, 2014	75,000	4.80		October 21, 2018
December 8, 2014	250,000	3.75		December 8, 2019
	4,823,766

Warrants -Assumptions

	2014	2013
Risk-free interest rate	1.11% - 1.67%	0.35%
Expected life in years	4.0 – 5.0	5.0
Expected volatility	64% - 66%	141%
Expected dividend yield	—	—

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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