Stock Offering	3 Months Ended
Mar. 31, 2012
Stock Offering [Abstract]
Stock Offering	Note 8 – Stock Offering In April 2011, the Company filed a shelf registration statement on Form S-3 with the SEC to, from time to time, sell up to an aggregate of $125 million of our common stock, warrants or debt securities. On August 19, 2011, the registration statement was declared effective by the SEC, which will allow the Company to access the capital markets for the three year period following this effective date. In February 2012, the Company entered into an At-the-Market Equity Offering Sales Agreement ("Sales Agreement") with Citadel Securities LLC ("Citadel") pursuant to which the Company may sell, at its option, up to an aggregate of $30.0 million in shares of common stock through Citadel, as sales agent. The Company will pay Citadel a commission equal to 2% of the gross proceeds from the sale of shares of the Company's common stock under the Sales Agreement. During the quarter ended March 31, 2012, 572,510 shares of the Company's common stock were sold under this Sales Agreement for net proceeds to the Company of $10.3 million.

Note 8 – Stock Offering

In April 2011, the Company filed a shelf registration statement on Form S-3 with the SEC to, from time to time, sell up to an aggregate of $125 million of our common stock, warrants or debt securities. On August 19, 2011, the registration statement was declared effective by the SEC, which will allow the Company to access the capital markets for the three year period following this effective date. In February 2012, the Company entered into an At-the-Market Equity Offering Sales Agreement ("Sales Agreement") with Citadel Securities LLC ("Citadel") pursuant to which the Company may sell, at its option, up to an aggregate of $30.0 million in shares of common stock through Citadel, as sales agent. The Company will pay Citadel a commission equal to 2% of the gross proceeds from the sale of shares of the Company's common stock under the Sales Agreement. During the quarter ended March 31, 2012, 572,510 shares of the Company's common stock were sold under this Sales Agreement for net proceeds to the Company of $10.3 million.