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Common Stock and Stock Warrants (Tables)

3 Months Ended

Mar. 31, 2016

Shares reserved for future issuance at March 31, 2016 are as follows:



	Number of Shares
Common stock options outstanding	3,733,711
Common stock options available for future grant	345,486
Common stock warrants	250,539
Total common shares reserved for future issuance	4,329,736

Summary of Warrants Outstanding

The following table summarizes the outstanding warrants as of March 31, 2016:



	Warrants Outstanding	Exercise Price		Expiration Date
Series C	9,919	$	147.91	11/20/2016
Series D	240,620	$	92.99	9/25/2019
Total warrants outstanding	250,539

- 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.

+ References + Details