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Consolidated Balance Sheets (Parenthetical) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 9,361,199 9,361,199
Preferred stock, outstanding 0 0
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 73,237,659 73,095,384
Common stock, shares outstanding 73,237,659 73,095,384
Series D convertible, Preferred stock
    
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 448,800 448,800
Preferred stock, issued 206,400 206,400
Preferred stock, outstanding 206,400 206,400