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           Statements of Cash Flows (Parenthetical) 
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           Dec. 31, 2009 
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|---|---|
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           Secured Notes 
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| Stated Interest | 10.00% | 
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           2.5% Convertible Notes due 2009 
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| Stated Interest | 2.50% | 
| X | ||||||||||
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- Definition 
          Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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