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Convertible Preferred Stock and Common Stock Warrants (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Securities purchase agreement, First Closing, Fair Value of Preferred Stock Issued $ 75.0  
Preferred stock purchased 85,900 75,800
Preferred stock dividend rate 12.75%  
Common stock shares issued 130,273,000 123,320,000
Stock warrants exercise price per share $ 7.50  
Securities Purchase Agreement, Total 200.0  
Preferred stock discount rate 12.75%  
Liquidation value, per share $ 1,000  
Preferred stock issuance costs 6.6  
Paid-in-kind dividends payable 13.6  
Toshiba and B&W [Member]
    
Securities Purchase Agreement, Total $ 100.0