Subsequent Events	12 Months Ended
Dec. 31, 2011
Subsequent Events [Abstract]
Subsequent Events	10. Subsequent Events *Common Stock Offerings* On January 11, 2012, the Company raised gross proceeds of approximately $23.7 million through the sale of 4,989,275 shares of its common stock in a publicly-marketed offering. These shares were offered pursuant to the Company's 2011 shelf registration statement, as amended effective January 5, 2012 pursuant to Rule 462(b) to increase the dollar amount of securities available for sale, filed with the SEC under which the Company could offer shares of its common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in units, in one or more offerings, up to a total dollar amount of $63,950,000. Such registration statement became effective as of January 19, 2011. There are no more securities available under the Company's 2011 shelf registration. In connection with this offering, the Company paid commissions and other offering-related costs of approximately $1.6 million, resulting in net proceeds to the Company of approximately $22.1 million. On February 8, 2012, the Company amended its shelf registration statement, originally filed on January 26, 2012, with the SEC, under which the Company may offer shares of its common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in units, in one or more offerings, up to a total dollar amount of $100,000,000. Such registration statement, as amended, became effective as of February 9, 2012. *Grant of Stock Options* Through March 7, 2012, the Company granted options for the purchase of 1,309,000 shares of its common stock to employees and non-employee directors. These grants had a weighted average exercise price of $4.60 per share, a weighted average fair value of $3.09 per share and were granted at an exercise price equal to or greater than the closing market value of the Company's stock on the dates of grant. *Exercise of Common Stock Warrants* Through March 7, 2012, a warrant holder exercised the right to purchase 57,000 shares of the common stock of the Company, with an exercise price of $3.30 per share, pursuant to a cashless exercise whereby the Company, in a net share settlement, issued 17,148 shares of its common stock to the warrant holder based on the excess of the market price over the exercise price on the date of exercise.

10. Subsequent Events

Common Stock Offerings

On January 11, 2012, the Company raised gross proceeds of approximately $23.7 million through the sale of 4,989,275 shares of its common stock in a publicly-marketed offering. These shares were offered pursuant to the Company's 2011 shelf registration statement, as amended effective January 5, 2012 pursuant to Rule 462(b) to increase the dollar amount of securities available for sale, filed with the SEC under which the Company could offer shares of its common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in units, in one or more offerings, up to a total dollar amount of $63,950,000. Such registration statement became effective as of January 19, 2011. There are no more securities available under the Company's 2011 shelf registration. In connection with this offering, the Company paid commissions and other offering-related costs of approximately $1.6 million, resulting in net proceeds to the Company of approximately $22.1 million.

On February 8, 2012, the Company amended its shelf registration statement, originally filed on January 26, 2012, with the SEC, under which the Company may offer shares of its common stock and preferred stock, various series of debt securities and/or warrants to purchase any of such securities, either individually or in units, in one or more offerings, up to a total dollar amount of $100,000,000. Such registration statement, as amended, became effective as of February 9, 2012.

Grant of Stock Options

Through March 7, 2012, the Company granted options for the purchase of 1,309,000 shares of its common stock to employees and non-employee directors. These grants had a weighted average exercise price of $4.60 per share, a weighted average fair value of $3.09 per share and were granted at an exercise price equal to or greater than the closing market value of the Company's stock on the dates of grant.

Exercise of Common Stock Warrants

Through March 7, 2012, a warrant holder exercised the right to purchase 57,000 shares of the common stock of the Company, with an exercise price of $3.30 per share, pursuant to a cashless exercise whereby the Company, in a net share settlement, issued 17,148 shares of its common stock to the warrant holder based on the excess of the market price over the exercise price on the date of exercise.