Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Deficit) (Tables)

Stockholders' Equity (Deficit) (Tables)

12 Months Ended

Dec. 31, 2017

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

As of December 31, 2017, warrants to purchase shares of common stock consisted of the following (in thousands, except per share price):

Date Issued	Expiration Date	Exercise Price		Outstanding
04/13/2012	04/13/2018	$	4.85		983
10/08/2014	10/08/2020	$	3.30		848
07/27/2017	07/27/2024	$	1.96		281
					2,112

Schedule Of Shares Reserved For Future Issuance [Table Text Block]

As of December 31, 2017, shares of common stock reserved by us for future issuance consisted of the following (in thousands):

Stock options outstanding		2,728
Shares issuable upon the exercise of warrants		2,112
		4,840

- 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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