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Common Stock
 6 Months Ended
Jun. 30, 2012
Common Stock [Abstract]  
Common Stock

Note 9. Common Stock

In the second quarter of 2012, an aggregate of 1,800,000 Series B Warrants were exercised and we received gross proceeds of $2,250,000. The remaining unexercised 5,300,000 Series B Warrants expired by their terms on May 2, 2012. These warrants were issued as part of our December 2011 financing. For the exercise of these warrants, we issued 1,800,000 shares of our common stock and 1,800,000 Series A Warrants. The Series A Warrants have an initial exercise price of $1.40 per share and will expire on the fifth anniversary of the closing date of the initial financing transaction in December 2011.