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Note 9 - Stockholders' Equity
 6 Months Ended
Jun. 30, 2013
Stockholders' Equity Note [Abstract]  
Stockholders' Equity Note Disclosure [Text Block]

 (9)  STOCKHOLDERS' EQUITY


Amendments to Articles of Incorporation


In June 2011, we amended our certificate of incorporation to increase the number of shares of authorized common stock to 1,500,000,000, par value $0.01 per share. Prior to the amendment, the number of shares of authorized common stock was 100,000,000, par value $0.01 per share. The certificate of amendment was approved by a majority of our stockholders on June 29, 2011.


Stock Plans


At our annual meeting of stockholders in June 2011, our stockholders approved an amendment to our 2007 Equity Incentive Plan to increase the maximum number of shares of common stock available for grant by 90,000,000 shares of common stock, resulting in an aggregate of 95,000,000 shares of common stock authorized for issuance pursuant to awards granted under our 2007 Equity Incentive Plan. The stockholders also approved an amendment to our 1997 Employee Stock Purchase Plan to increase the number of shares of common stock reserved for issuance under the plan by 500,000, for a total of 1,000,000 shares reserved as of June 30, 2013.


2011 Private Placement


In June 2011, we entered into a Securities Purchase Agreement with certain purchasers (Securities Purchase Agreement), pursuant to which we agreed to sell 160,000,006 shares of our common stock (Shares) and warrants to purchase 80,000,005 shares of our common stock (Warrants) with an exercise price of $0.18 per share (2011 Private Placement), for an aggregate price of $24.0 million. The 2011 Private Placement closed on July 1, 2011. For each share purchased, the investors received one Warrant to purchase 0.5 shares of common stock (together with a Share, a Unit), at a purchase price of $0.15 per Unit. The Warrants were immediately exercisable and expire on the fifth anniversary of the closing date of July 1, 2011. The Warrants may be exercised for cash only or, if a registration statement is not then effective and available for the resale of the shares of common stock issuable upon exercise of the Warrants, by surrender of such Warrant, or a portion of such Warrant, by way of cashless exercise. There is no right to exercise the Warrants to the extent that after giving effect to such exercise the holder would beneficially own in excess of 9.99% of our outstanding shares of common stock or such other limit as may be designated by any particular purchaser. Each holder of the Warrants can amend or waive the foregoing limitation by written notice to the Company, with such waiver taking effect only upon the expiration of a 61-day notice period.


Under the terms of the Securities Purchase Agreement, on July 29, 2011, the Company filed a registration statement with the SEC to register for resale the Shares and the shares of common stock issuable upon the exercise of the Warrants (the Warrant Shares, and collectively with the Shares, the Registrable Securities). The registration statement was declared effective on August 4, 2011. The Company is obligated to maintain the effectiveness of the registration statement with respect to an investor’s Registrable Securities until the investor is able to sell the Registrable Securities without limitation or restriction under Rule 144. There is currently only one investor who is an affiliate of the Company and is therefore not able to sell the Registrable Securities without limitation under Rule 144, and that investor has agreed to waive their right to require the Company to maintain the effectiveness of the registration statement until they provide notice otherwise. If the Company fails to keep the registration statement continuously effective for a designated time (with limited exceptions) during the period the Company is obligated to maintain the registration statement, the Company may be obligated to pay to the holders of the Registrable Securities liquidated damages in an amount equal to 1.0% per month of such holder's pro rata interest in the total purchase price of the Private Placement, capped at a total penalty of 6.0%.


The Company received total proceeds of $22.8 million from the 2011 Private Placement, which was net of issuance costs of approximately $1.2 million. During the six months ended June 30, 2013, the Company received $0.6 million for an exercise of a Warrant.


2012 Private Placement


In July 2012, the Company entered into a securities purchase agreement with certain purchasers, pursuant to which the Company agreed to sell 102,000,000 shares of its common stock (2012 Shares) at a purchase price of $0.525 per share of common stock, for an aggregate price of approximately $53.6 million (2012 Private Placement). The 2012 Private Placement closed on July 30, 2012.


In connection with entering into the securities purchase agreement, the Company also entered into a registration rights agreement. On August 24, 2012, the Company filed a registration statement with the SEC to register the 2012 Shares for resale. The registration statement was declared effective on September 6, 2012. If the Company fails to keep the registration statements continuously effective for a designated time (with limited exceptions), the Company may be obligated to pay to each holder of the 2012 Shares an amount equal to 1.5% per month of the aggregate purchase price of the unregistered 2012 Shares held by such holder, capped at a total penalty of 9.0%.


The Company received total proceeds of $50.5 million from the 2012 Private Placement, which was net of issuance costs of approximately $3.1 million.