Quarterly report pursuant to Section 13 or 15(d)

Sale of Common Stock (Details)

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Sale of Common Stock (Details) (USD $)
0 Months Ended 3 Months Ended 6 Months Ended
Feb. 22, 2013
Jun. 30, 2013
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Sale of Common Stock          
Shares of common stock sold   66,480,000 66,480,000   32,434,000
Gross proceeds from sale of common stock $ 4,040,000        
Common stock, shares unissued   7,000,000 7,000,000    
Common stock, shares reserved but unissued   7,000,000 7,000,000    
Warrants          
Impact to other income (expense)   6,113,000 2,114,000 (2,400,000)  
2013 Warrants
         
Warrants          
Ending balance (in shares) 28,818,666 28,818,666 28,818,666    
Exercise price of warrants (in dollars per share) $ 0.20 $ 0.20 $ 0.20    
Grant date fair value   2,759,000 2,759,000    
Fair value of derivative liability   2,017,000 2,017,000    
Impact to other income (expense)   1,626,000 742,000    
2013 SPA Option
         
Warrants          
Ending balance (in shares) 13,466,667 13,466,667 13,466,667    
Exercise price of warrants (in dollars per share) $ 0.15 $ 0.15 $ 0.15    
Grant date fair value   1,211,000 1,211,000    
Fair value of derivative liability   404,000 404,000    
Impact to other income (expense)   1,390,000 807,000    
SPA
         
Sale of Common Stock          
Shares of common stock sold 26,933,333        
Common stock, share price (in dollars per share) $ 0.15        
Term to hold share purchase 24 months        
Warrants          
Proceeds received to be used for investor relations     1,000,000    
Payments made for investor relations     500,000    
Escrow account for investor relations   500,000 500,000    
Period from closing for release of funds held in escrow account     6 months    
Amortization period of investor relations payment     1 year    
SPA | 2013 Warrants
         
Warrants          
Exercise price of warrants (in dollars per share) $ 0.20        
Term of warrants 5 years        
Number of shares exercisable under warrants issued 28,818,666        
Period for presenting effective registration statement for avoiding cashless exercise of warrants 180 days        
Limitation of beneficial ownership of common stock for exercise of warrants (as a percent) 4.99%        
Discretionary increase in limitation of beneficial ownership of common stock for exercise of warrants (as a percent) 9.99%        
Notice period for discretionary increase in limitation of beneficial ownership of common stock for exercise of warrants 61 days        
SPA | 2013 Investor Warrants
         
Sale of Common Stock          
Common stock issuable under warrants 26,933,333        
Gross proceeds from sale of common stock 4,040,000        
Net proceeds from sale of common stock $ 3,504,000        
SPA | 2013 Placement Agent Warrants
         
Sale of Common Stock          
Common stock issuable under warrants 1,885,333        
SPA | 2013 SPA Option
         
Sale of Common Stock          
Portion of shares of common stock and warrants available for same per share purchase price (as a percent) 0.5        
Right to Shares Agreement
         
Sale of Common Stock          
Number of investors entered into agreement 1        
Common stock, shares unissued 7,000,000        
Rights to purchase common stock (in shares) 7,000,000        
Period for obligation to deliver shares 3 days