Sales of Common Stock	9 Months Ended
Sep. 30, 2012
Sales of Common Stock [Abstract]
Sales of Common Stock	Note 9 - Sales of Common Stock The Board of Directors of the Company (the "Board") has appointed a standing Finance Committee (the "Committee") to assist the Board with its responsibilities to monitor, provide advice to senior management of the Company and approve all capital raising activities. The Committee has been authorized by the Board to approve all At Market Issuance sales transactions. In doing so, the Committee sets the amount of shares to be sold, the period of time during which such sales may occur and the minimum sales price per share. In September 2012, the Company entered into an At Market Issuance Sales Agreement, under which the Company may sell an aggregate of $50 million in gross proceeds of its common stock. This agreement replaces the previous sales agreement entered in March 2010, which also allowed for the sale of an aggregate of $50 million in gross proceeds of its common stock, but had recently met its limitation on sales of shares. The shares of common stock are being offered pursuant to a shelf registration statement previously filed with the SEC. For the nine months ended September 30, 2012, the Company sold 8.4 million shares at an average sales price of $1.70 per share, resulting in $14.0 million in net proceeds; this amount excludes $0.8 million received in early 2012 for 0.7 million shares traded in late December 2011. Since entering into the March 2010 sales agreement through November 7, 2012, the Company has sold 24,957,715 shares of its common stock and received gross proceeds of $49.9 million. No sales have occurred under the September 2012 sales agreement. In May 2012, the Company sold 10,000,000 shares of its common stock to two affiliates of RA Capital Management, LLC at a price of $1.22 per share, resulting in $12.1 million in net proceeds. The shares were offered under an effective shelf registration statement previously filed with the SEC.

Note 9 - Sales of Common Stock

The Board of Directors of the Company (the "Board") has appointed a standing Finance Committee (the "Committee") to assist the Board with its responsibilities to monitor, provide advice to senior management of the Company and approve all capital raising activities. The Committee has been authorized by the Board to approve all At Market Issuance sales transactions. In doing so, the Committee sets the amount of shares to be sold, the period of time during which such sales may occur and the minimum sales price per share. In September 2012, the Company entered into an At Market Issuance Sales Agreement, under which the Company may sell an aggregate of $50 million in gross proceeds of its common stock. This agreement replaces the previous sales agreement entered in March 2010, which also allowed for the sale of an aggregate of $50 million in gross proceeds of its common stock, but had recently met its limitation on sales of shares. The shares of common stock are being offered pursuant to a shelf registration statement previously filed with the SEC. For the nine months ended September 30, 2012, the Company sold 8.4 million shares at an average sales price of $1.70 per share, resulting in $14.0 million in net proceeds; this amount excludes $0.8 million received in early 2012 for 0.7 million shares traded in late December 2011. Since entering into the March 2010 sales agreement through November 7, 2012, the Company has sold 24,957,715 shares of its common stock and received gross proceeds of $49.9 million. No sales have occurred under the September 2012 sales agreement.

In May 2012, the Company sold 10,000,000 shares of its common stock to two affiliates of RA Capital Management, LLC at a price of $1.22 per share, resulting in $12.1 million in net proceeds. The shares were offered under an effective shelf registration statement previously filed with the SEC.