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Common stock - Note 9
 12 Months Ended
Dec. 31, 2012
Notes to Financial Statements  
Common stock - Note 9

9. Common stock

 

In June 2012, we raised $10.5 million before issuance costs of approximately $823,000 through an underwritten public offering of 4.2 million shares of our common stock and warrants to purchase 2.1 million shares of our common stock. Details of the warrants are described below in Note 10.

 

In May 2012, we raised approximately $5.0 million before issuance costs of approximately $71,000 from the sale of 3.3 million shares of common stock and warrants to purchase 1.0 million shares of our common stock to private investors. Details of the warrants are described below in Note 10.

 

In November 2011, we raised approximately $10.5 million, before issuance costs of approximately $925,000, through an underwritten public offering of 2.2 million shares of common stock and warrants to purchase 1.3 million shares of our common stock. Details of the warrants are described below in Note 10.

 

During 2011, we also raised approximately $12.1 million, before issuance costs of $635,000, through the sale of approximately 1.7 million shares of our common stock under our 2010 and 2011 committed equity financing facilities.