Warrants (Tables)

12 Months Ended

Dec. 31, 2014

At December 31, 2013, outstanding convertible preferred stock warrants consisted of:


Issue Date	Original Term		Convertible Preferred Stock		Exercise Price		Number of Shares of Outstanding Underlying Warrant		Estimated Fair Value as of December 31, 2013 (In thousands)
December 2010 (a)		7 years		Series G	$	21.78		17,215	$	14
April 2012 (b)		5 years		Series G	$	21.78		357,216		218
August 2012 (c)		7 years		Series G	$	21.78		167,182		293

								541,613	$	525

(a)—Issued

to lenders in connection with the 2010 Loan (see Note 8).

(b)—Issued

to note holders upon the conversion of all of the 2010 Notes (see Note 8).

(c)—Issued

to lenders in connection with the 2012 Loan (see Note 8).

Common Stock [Member]

Components of Warrants Outstanding

At December 31, 2013, outstanding common stock warrants consisted of:


	Original Term		Exercise Price		Number of Shares Outstanding Underlying Warrants
Original issue date:
July 2006		10 years	$	31.72		17,656
November 2006		10 years	$	31.72		1,576
February 2008		10 years	$	35.07		22,792
August 2009		10 years	$	21.78		33,472
July 2010		9 years	$	21.78		6,694

						82,190

- 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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