Quarterly report pursuant to Section 13 or 15(d)

Convertible Notes and Warrants (Details)

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Convertible Notes and Warrants (Details) (USD $)
6 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Feb. 22, 2011
2011 Securities Purchase Agreement
item
Feb. 20, 2013
2011 and 2012 Warrants
2011 Securities Purchase Agreement
Feb. 22, 2013
2011 and 2012 Warrants
Amendment and Waiver Agreement
Feb. 22, 2013
2011 Warrants
Feb. 22, 2011
2011 Warrants
Jun. 30, 2013
2011 Warrants
Jun. 30, 2013
2011 Warrants
Dec. 31, 2012
2011 Warrants
Jul. 02, 2012
2012 Warrants
Feb. 22, 2013
2012 Warrants - $0.15 Warrants
Jul. 02, 2012
2012 Warrants - $0.15 Warrants
Jun. 30, 2013
2012 Warrants - $0.15 Warrants
Dec. 31, 2012
2012 Warrants - $0.15 Warrants
Jul. 02, 2012
2012 Warrants - $0.25 Warrants
Jun. 30, 2013
2012 Warrants - $0.25 Warrants
Dec. 31, 2012
2012 Warrants - $0.25 Warrants
Feb. 22, 2013
Third Tranche Warrants
Jan. 16, 2013
Third Tranche Warrants
Jun. 30, 2013
Third Tranche Warrants
Jun. 30, 2013
2011 Convertible Notes
Feb. 22, 2011
2011 Convertible Notes
Jun. 30, 2013
2012 Convertible Notes
Jul. 02, 2012
2012 Convertible Notes
Jan. 16, 2013
Third Tranche Convertible Notes
Convertible Notes                                                    
Interest rate (as a percent)                                           5.00% 5.00% 5.00%   5.00%
Amount of additional secured convertible debt that may be secured in tranche     $ 2,000,000                                              
Number of tranches     2                                              
Amount of additional debt funding available in each separate tranche     1,000,000                                              
Aggregate principal amount                                             4,000,000   1,000,000 250,000
Period considered in a year for calculation of interest                                           360 days        
Number of securities called by outstanding warrants returned to the Company for forfeiture (in shares)         12,500,000                                          
Amount of debentures subject to relinquishment of right to purchase         750,000                                          
Conversion price (in dollars per share)                                           $ 0.10   $ 0.10   $ 0.10
Percentage of outstanding principal redeemed under a change of control 130.00% 130.00%                                       130.00%        
Percentage of accrued and unpaid interest 100.00% 100.00%                                       100.00%        
Warrants                                                    
Beginning balance (in shares)                 40,000,000         10,000,000     10,000,000                  
Less: Canceled (in shares)                 (40,000,000)         (10,000,000)     (10,000,000)   (2,500,000)   (2,500,000)          
Add: Issued           65,263,156 40,000,000   65,263,156   20,000,000 16,315,790 10,000,000 16,315,790   10,000,000       2,500,000 2,500,000          
Less: Exercised (in shares)               (20,335,524) (29,085,523)                                  
Ending balance (in shares)               36,177,633 36,177,633         16,315,790           2,500,000            
Exercise price of warrants (in dollars per share)         $ 0.098 $ 0.098 $ 0.15 $ 0.098 $ 0.098 $ 0.15   $ 0.098 $ 0.15 $ 0.098 $ 0.15 $ 0.25   $ 0.25   $ 0.15            
VWAP price (in dollars per share)         $ 0.155                                          
Exercise price of warrants cancelled (in dollars per share)                 $ 0.15         $ 0.15     $ 0.25       $ 0.15          
Exercise price of warrants issued (in dollars per share)                 $ 0.098         $ 0.098             $ 0.15          
Exercise price of warrants exercised (in dollars per share)                 $ 0.098                                  
Number of shares exercisable under warrants issued       50,000,000 81,578,946                                          
Purchase price as a percentage of exercise price of warrants                 30.00%                                  
Shares of common stock issued on conversion of warrants               7,478,226 10,695,967                                  
Term of warrants                     5 years                 5 years            
Percentage of change in the present value of the cash flows of the convertible notes and associated warrants, minimum 10.00%                                                  
Loss on the extinguishment of debt $ 1,283,000