Stockholders' Equity

6 Months Ended

Jun. 30, 2011

Stockholders' Equity

Stockholders' Equity

(10) Stockholders’ Equity

In January 2011, the Company entered into a controlled equity offering sales agreement (the “Cantor Agreement”) with Cantor Fitzgerald & Co. (“Cantor”) pursuant to which the Company may issue and sell up to 5,000,000 shares of its common stock from time to time through Cantor, acting as agent. The Company agreed to pay Cantor a commission up to 5% of the gross proceeds from each sale and to reimburse Cantor for certain expenses incurred in connection with entering into the Cantor Agreement.  During the three months ended June 30, 2011, the Company sold 575,000 shares of common stock under the Cantor Agreement and raised $2.2 million in net proceeds, after deducting commission and offering expenses.  As of June 30, 2011, the Company had 4,425,000 shares available to be sold under the Cantor Agreement.

In May 2011, the Company issued 11,500,000 shares of its common stock in an underwritten public offering, including the underwriter’s exercise of their full over-allotment option to purchase an additional 1,500,000 shares of common stock.  The net proceeds to the Company were $33.7 million, after deducting underwriting fees and offering expenses.