Warrants to Purchase Preferred Stock and Common Stock (Tables)

9 Months Ended

Sep. 30, 2013

Preferred stock

Warrants to Purchase Preferred Stock and Common Stock

Summary of the Company's outstanding warrants to purchase stock

						Fair Value
						as of
	Grant	Expiration	Exercise		Warrants	December 31,
	Date	Date	Price		Outstanding	2012

Series A	June 7, 2007	June 7, 2017	$	1.27	35,520	$	299
Series B-1	December 8, 2008	December 7, 2018	$	4.86	33,930	246
Series C	February 8, 2010	February 8, 2020	$	3.79	31,659	245
Series 1	December 8, 2010	June 30, 2017	$	2.46	31,130	256
Series 3	December 8, 2010	February 6, 2015	$	5.75	8,694	57
Totals					140,933	$	1,103

Common stock

Warrants to Purchase Preferred Stock and Common Stock

Summary of the Company's outstanding warrants to purchase stock

Grant	Expiration	Exercise		Warrants
Date	Date	Price		Outstanding

December 8, 2010	June 30, 2017	$	2.46	31,130
December 8, 2010	February 6, 2015	$	5.75	8,694
				39,824

- 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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