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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data
Sep. 30, 2011
Dec. 31, 2010
Current assets:  
Accounts receivable, allowance$ 5$ 9
Stockholders' Equity  
Common Stock, par value$ 0.01$ 0.01
Common Stock, shares authorized1,050,000,0001,050,000,000
Common Stock, shares issued191,229,000191,489,000
Common Stock, shares outstanding191,229,000191,489,000
Series A Preferred Stock [Member]
  
Stockholders' Equity  
Preferred stock, par value$ 0.01$ 0.01
Preferred stock, shares authorized2,000,0002,000,000
Preferred stock, shares issued863,000813,000
Preferred stock, shares outstanding863,000813,000
Preferred stock, liquidation preference863813
Series B Preferred Stock [Member]
  
Stockholders' Equity  
Preferred stock, par value$ 0.01$ 0.01
Preferred stock, shares authorized14,000,00014,000,000
Preferred stock, shares issued9,023,0008,380,000
Preferred stock, shares outstanding9,023,0008,380,000
Preferred stock, liquidation preference13,53512,570
Series C Preferred Stock [Member]
  
Stockholders' Equity  
Preferred stock, par value$ 0.01$ 0.01
Preferred stock, shares authorized4,100,0004,100,000
Preferred stock, shares issued3,460,0002,211,000
Preferred stock, shares outstanding3,460,0002,211,000
Preferred stock, liquidation preference$ 5,190$ 3,317