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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data
Sep. 30, 2011
Dec. 31, 2010
Preferred stock, par value$ 0.001$ 0.001
Preferred stock, shares authorized5,000,0000
Preferred stock, shares issued00
Preferred stock, shares outstanding00
Common stock, par value$ 0.001$ 0.001
Common stock, shares authorized150,000,00060,000,000
Common stock, shares issued59,597,89412,067,090
Common stock, shares outstanding59,597,89412,067,090
Series A Preferred Stock [Member]
  
Preferred stock, par value$ 0.001$ 0.001
Preferred stock, shares authorized07,810,402
Preferred stock, shares issued07,746,297
Preferred stock, shares outstanding07,746,297
Preferred stock, liquidation value$ 0$ 3,021
Series B Preferred Stock [Member]
  
Preferred stock, par value$ 0.001$ 0.001
Preferred stock, shares authorized08,902,946
Preferred stock, shares issued08,581,037
Preferred stock, shares outstanding08,581,037
Preferred stock, liquidation value08,663
Series C Preferred Stock [Member]
  
Preferred stock, par value$ 0.001$ 0.001
Preferred stock, shares authorized011,431,131
Preferred stock, shares issued011,431,131
Preferred stock, shares outstanding011,431,131
Preferred stock, liquidation value057,585
Series D Preferred Stock [Member]
  
Preferred stock, par value$ 0.001$ 0.001
Preferred stock, shares authorized06,775,661
Preferred stock, shares issued06,775,660
Preferred stock, shares outstanding06,775,660
Preferred stock, liquidation value$ 0$ 60,000