Preferred Stock Warrants (Tables)

12 Months Ended

Dec. 31, 2015

The key terms of the convertible preferred stock are summarized in the following table:


			Warrants Outstanding
	Warrants Outstanding December 31, 2014		Warrants Outstanding December 31, 2013		Exercise Price		Expiration
Series A preferred stock warrants		—		22,914	$	11.324	Various dates in 2014
Series B preferred stock warrants		10,414		10,414		7.45	July 31, 2018
Series B-1 preferred stock warrants		47,060		47,060		7.45	June 30, 2018
Series B-1 preferred stock warrants		746,295		746,295		2.6075	Various dates in 2016 – 2021
Series C preferred stock warrants		171,566		171,566		5.125	Various dates in 2022 – 2023

Total preferred stock warrants		975,335		998,249

- 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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