XML 57 R38.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity (Details Textual) (USD $)
 1 Months Ended 6 Months Ended 0 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2012
Jun. 30, 2012
Sep. 30, 2012
Dec. 31, 2011
Jan. 31, 2011
Jan. 02, 2012
Stock and Cash Based Incentive Plan [Member]
May 14, 2010
Stock and Cash Based Incentive Plan [Member]
Sep. 30, 2012
Stock and Cash Based Incentive Plan [Member]
Sep. 30, 2012
Amended 2000 Stock Option Plan [Member]
Oct. 31, 2011
Common Stock Warrants [Member]
Jan. 31, 2011
Investor purchase agreements [Member]
Sep. 30, 2012
Investor purchase agreements [Member]
Sep. 30, 2012
Investor purchase agreements [Member]
Jun. 30, 2012
Sales Agreement [Member]
Sep. 30, 2012
Sales Agreement [Member]
Dec. 31, 2011
Underwritten public offering [Member]
Sep. 30, 2012
Underwritten public offering [Member]
Sep. 30, 2012
Underwritten public offering [Member]
Dec. 31, 2011
Overallotment option [Member]
Sep. 30, 2012
VGX Equity Compensation Plan [Member]
Stockholders' Equity (Textual) [Abstract]                                        
Potential sales proceeds                           $ 25,000,000            
Rate of commission or discount rate to placement agent                           3.00%            
Shares of common stock sold under sales agreement                             2,086,986          
Weighted Average Price Per Share on Sale of Common Stock     $ 0.61                                  
Common stock shares issued                     21,130,400         7,699,712     962,465  
Warrants to purchase number of shares of common stock     21,593,844 21,743,844             10,565,200         5,774,784        
Exercise Price         1.40                     0.65        
Aggregate purchase price under securities purchase agreement                     24,300,000                  
Ratio to determine the number of warrants received per one share of common stock sold                     0.5         0.75        
Purchase price per unit of common stock and warrant                     $ 1.15         $ 0.5195        
Term of the warrants in years                     5 years         5 years        
First exercisable date from the date of issuance in days                     180 days                  
Closing bid price of warrants, minimum                     $ 2.8         $ 1.3        
Trading date of warrants in days                     20 days         20 days        
Net proceeds from the transaction                     23,000,000       1,200,000 3,700,000        
Change in fair value of warrants                       $ 488,000,000 $ 277,000,000       $ 635,000,000 $ 751,000,000    
Increased aggregate number of shares available for grants under the Incentive Plan               1,800,414                        
Warrants expired to purchase number of shares of common stock 150,000                 2,364,394                    
Number of potential shares authorized for issuance under a share-based compensation plan             2,055,331                          
Increased number of securities available for future issuance           2,055,331 2,000,000                          
Reserved number of shares under the Incentive Plan               9,860,662                        
Number of shares of vested restricted stock outstanding under the plan               240,000                        
Number of common stock outstanding under the Incentive Plan               7,505,035                        
Vesting period of Incentive Plan   3 years                                    
Contractual year term of Incentive Plan   10 years                                    
Number of options outstanding to purchase common stock                 1,456,434                     7,577,516