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Supplemental Cash Flow Information and Material Non-Cash Transactions (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Jul. 31, 2012
Apr. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Warrants issued (in shares)         4,757,941
Fair value of shares received   $ 78,872 $ 78,872    
Number of shares issued in transaction, (Shares)     30,402,615    
Compensation Options Issued to Underwriters 166,667 450,000 450,000    
Convertible debt repurchase, shares       1,902,684  
Principal and Interest on Repurchase of Convertible Debt       $ 6,358  
Compensation Warrants [Member]
         
Warrants issued (in shares) 166,667