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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Common stock, shares authorized 70,000,000 70,000,000
Common stock, par value $ 0.001 $ 0.001
Common stock, shares issued 32,972,631 32,778,993
Common stock, shares outstanding 32,972,631 32,778,993
Series A Preferred Stock [Member]
    
Preferred stock, shares authorized 444,541 444,541
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares issued 83 83
Preferred stock, shares outstanding 83 83
Preferred stock, liquidation preference $ 0.001 $ 0.001
Series B Preferred Stock [Member]
    
Preferred stock, shares authorized 54,425 54,425
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares issued 95 114
Preferred stock, shares outstanding 95 114
Preferred stock, liquidation preference $ 0.001 $ 0.001