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Fair Value (Details 2) (USD $)
 12 Months Ended 197 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Dec. 14, 2012
Dec. 14, 2012
Aspire Capital Fund, LLC
Dec. 31, 2012
Aspire Capital Fund, LLC
Dec. 14, 2012
Aspire Capital Fund, LLC
Maximum
Mar. 06, 2013
Economic Rights
Mar. 22, 2012
Economic Rights
Dec. 31, 2012
Economic Rights
Dec. 31, 2012
Economic Rights
Dec. 31, 2012
Economic Rights
Minimum
Dec. 31, 2012
Economic Rights
Maximum
Feb. 28, 2007
Warrants
Dec. 31, 2012
Warrants
Dec. 31, 2011
Warrants
Reconciliation of the beginning and ending balance of Level 3 inputs                              
Balance at the beginning of the period $ 71,000                            
Sale                   (1,097,000)          
Change in valuation of liability                   (23,000)       51,000 (600,000)
Balance at the end of the period 1,140,000 1,140,000                          
Number of shares issued under purchase agreement       158,982                      
Purchase price for shares issued under purchase agreement 1,418,000     1,000,000                      
Shares committed to purchase       1,455,787                      
Period of common stock purchase agreement       2 years                      
Common stock purchase agreement, purchase commitment           19,000,000                  
Stock issued for non-cash consideration       74,548                      
Stock purchase agreement 423,000 423,000     400,000                    
Amount to be paid as percentage of future litigation settlement amount received               10.00%              
Fair value of the liability                 1,100,000 1,100,000          
Change in fair value of the derivative 23,000 23,000             23,000            
Warrants Liability                              
Expected volatility (as a percent)                     25.00% 75.00% 85.00%    
Amount of award or settlement                     10,000,000 20,000,000      
Discount rate (as a percent)                   17.50%          
Timing of cash flows                     9 months 1 year 6 months      
Royalty rate (as a percent)                   6.00%          
Litigation expenses                   3,000,000          
Stay period             30 days                
Fair value of the warrants                         6,800,000 0  
Risk free interest rate (as a percent)                         4.68%    
Expected dividend yield (as a percent)                         0.00%    
Contractual life                         7 years    
Expected term                           1 year 1 month 17 days  
Value of financial instrument $ 0 $ 0 $ 0