Sales of Common Stock	12 Months Ended
Dec. 31, 2011
Sales of Common Stock	Note 9 — Sales of Common Stock In March 2010, the Company entered into an At Market Issuance Sales Agreement under which the Company may sell an aggregate of $50 million of gross proceeds of the Company’s common stock. The Company’s Board of Directors authorized the sale of up to 25 million shares of common stock pursuant to the At Market Issuance Sales Agreement. In 2011, the Company sold 6,001,841 shares at sales prices ranging from $1.25 – $2.75 and received net proceeds of $11.8 million (with $0.8 million received in early 2012) under the At Market Issuance Sales Agreement. In 2010, the Company sold 10,513,849 shares at a range of $2.10 – $2.55 and received net proceeds of $23.1 million under the At Market Issuance Sales Agreement. Since entering into the At Market Issuance Sales Agreement in March 2010, the Company has sold 21,053,564 shares and received gross proceeds of $42.1 million through March 8, 2012.

Note 9 — Sales of Common Stock

In March 2010, the Company entered into an At Market Issuance Sales Agreement under which the Company may sell an aggregate of $50 million of gross proceeds of the Company’s common stock. The Company’s Board of Directors authorized the sale of up to 25 million shares of common stock pursuant to the At Market Issuance Sales Agreement. In 2011, the Company sold 6,001,841 shares at sales prices ranging from $1.25 – $2.75 and received net proceeds of $11.8 million (with $0.8 million received in early 2012) under the At Market Issuance Sales Agreement. In 2010, the Company sold 10,513,849 shares at a range of $2.10 – $2.55 and received net proceeds of $23.1 million under the At Market Issuance Sales Agreement. Since entering into the At Market Issuance Sales Agreement in March 2010, the Company has sold 21,053,564 shares and received gross proceeds of $42.1 million through March 8, 2012.