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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Common stock, par value per share $ 0.000666 $ 0.000666
Common stock, shares authorized 3,950,000,000 3,950,000,000
Common stock, shares issued 48,466,267 28,990,630
Common stock, shares outstanding 48,466,267 28,990,630
Preferred stock, shares authorized 50,000,000 50,000,000
7.5% Series A-1 Convertible Preferred Stock [Member]
    
Preferred stock, par or stated value per share $ 0.000666 $ 0.000666
Preferred stock, shares authorized 1,500,000 1,500,000
Preferred stock, shares issued 23,499 22,637
Preferred stock, shares outstanding 23,499 22,637
7.5% Series A-2 Convertible Preferred Stock [Member]
    
Preferred stock, par or stated value per share $ 0.000666 $ 0.000666
Preferred stock, shares authorized 250,000 250,000
Preferred stock, shares issued 5,271 6,672
Preferred stock, shares outstanding 5,271 6,672
7.5% Series B convertible preferred stock [Member]
    
Preferred stock, par or stated value per share $ 0.000666 $ 0.000666
Preferred stock, shares authorized 600,000 600,000
Preferred stock, shares issued 28,399 29,907
Preferred stock, shares outstanding 28,399 29,907