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Stockholders' Equity
 6 Months Ended
Jun. 30, 2015
Stockholders' Equity [Abstract]  
Stockholders' Equity
12.Stockholders’ Equity

Preferred Stock

We have authorized 5 million shares of $0.001 par value preferred stock. Our Board of Directors is authorized to designate the terms and conditions of any preferred stock we issue without further action by the common stockholders.  There were 13,500 shares of Series A 3.6% Convertible Preferred Stock issued at June 30, 2015 and December 31, 2014 and 0 and 5,311 shares outstanding as of June 30, 2015 and December 31, 2014, respectively.

In October 2014, we entered into a Securities Purchase Agreement with certain institutional investors pursuant to which the Company sold a total of 13,500 units for a purchase price of $1,000 per unit, with each unit consisting of one share of the Company’s Series A 3.6% Convertible Preferred Stock, which are convertible into shares of the Company’s common stock with a conversion price of $0.52, and warrants to purchase up to a number of shares of common stock equal to 100% of the conversion shares under the shares of preferred stock, in a registered direct offering. The preferred stock and the warrants were immediately separable and were issued separately. As of June 30, 2015, all remaining outstanding Series A 3.6% Convertible Preferred Stock were converted into shares of common stock.

We recorded a dividend of $1.2 million for the year ended December 31, 2014, related to a beneficial conversion feature included in the issuance of our Series A 3.6% Convertible Preferred Stock.  The fair value of the common stock into which the Series A 3.6% Convertible Preferred Stock was convertible on the date of issuance exceeded the proceeds allocated to the preferred stock, resulting in the beneficial conversion feature that we recognized as a dividend to the preferred shareholders and, accordingly, an adjustment to net loss to arrive at net loss allocable to common shareholders.  Certain shares of Series A 3.6% Convertible Preferred Stock were not convertible until shareholder approval, which occurred in January 2015.  As a result, additional dividends for the beneficial conversion feature of $0.7 million were recorded during the quarter ended March 31, 2015.
 
In connection with the 3.6% Convertible Preferred Stock outstanding at December 31, 2014, we declared a cash dividend of $0.07 million.  The cash dividend was paid in January 2015.
 
Common Stock

In May 2014, the Company entered into a sales agreement with Cowen and Company, LLC, relating to shares of our common stock, $0.001 par value per share. Pursuant to this agreement, through April 30, 2015, Cowen sold a total of 5.8 million shares of our common stock, raising approximately $7.2 million in net proceeds (after deductions for sales agent commissions and discounts and other offering costs), through an “at the market offering.”

In September 2014, the Company and 13 holders of warrants dated June 4, 2014 to purchase a total of 4 million shares of the Company’s common stock agreed to amend the warrants in order to reduce the exercise price from $3.00 per share to $1.00 per share and change the expiration date from June 4, 2019 to September 10, 2014.  The Company received proceeds of approximately $4 million from the exercise of the warrants.  In addition, pursuant to the terms of the amendment, upon each holder’s exercise of all shares for cash prior to the amended expiration date, the Company issued additional warrants for the same number of common shares to the holders.  The additional warrants have an exercise price of $2.00 per share, and are exercisable on the date that is six months and one day from the date of issuance and expire five years from the date of issuance.  For those investors participating in the October 2014 issuance of Series A 3.6% Convertible Preferred Stock, we agreed to reduce the exercise price of 3.4 million warrants from $2.00 per share to $0.5771 per share, conditioned upon shareholder approval which was obtained in January 2015.  As of June 30, 2015, all 3.4 million warrants had been exercised, some via cash and others on a cashless basis resulting in the issuance of an aggregate of 1.8 million shares of Common Stock, and receipt by the Company of $0.1 million in net proceeds.

In October 2014 the Company entered into a Securities Purchase Agreement with certain institutional investors pursuant to which it issued common stock purchase warrants to the institutional investors.  Each warrant has an exercise price of $0.5771 per share, is exercisable six months after the date of issuance and expires five years from the date on which it is initially exercisable.  As of June 30, 2015, 8.5 million of the October 2014 warrants have been exercised for cash at $0.5771 per share for net proceeds of $4.9 million and 17.5 million October 2014 warrants remain outstanding.

In May 2015, the Company entered into a Securities Purchase Agreement with certain institutional investors pursuant to which the Company agreed to sell up to $25 million of units, with each unit consisting of one share of its common stock and one warrant to purchase one share of its common stock, in a registered direct offering.  The purchase and sale of the units is expected to take place in two separate closings.  At the initial closing, which took place on May 8, 2015, the Company received approximately $17.7 million in net proceeds from the sale of units. The purchase price for each unit sold at the initial closing was $0.77. Each warrant issued as part of the units at the initial closing has an initial exercise price of $1.02 per share, will be exercisable six months and one day after the date of issuance and expires five years from the date it becomes exercisable. The second closing of the purchase and sale of the units is subject to certain conditions, including, without limitation, shareholder vote, which is anticipated to take place at the Company’s annual stockholder meeting in August 2015. If the Company satisfies these conditions, the second closing will occur within ten days after satisfaction (or waiver) of these conditions.