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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000 5,000
Preferred stock, shares issued      
Preferred stock, shares outstanding      
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 250,000 250,000
Common stock, shares issued 182,792 154,626
Common stock, shares outstanding 182,792 154,626