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Related Party Transactions (Details) (USD $)
 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2011
VGX Int'l [Member]
Mar. 24, 2010
VGX Int'l [Member]
Dec. 31, 2012
VGX Int'l [Member]
Dec. 31, 2011
VGX Int'l [Member]
Dec. 31, 2010
VGX Int'l [Member]
Dec. 31, 2010
VGX Int'l [Member]
Sublease Income [Member]
Dec. 31, 2012
OncoSec [Member]
Dec. 31, 2011
OncoSec [Member]
Sep. 28, 2011
OncoSec [Member]
First warrant [Member]
Mar. 24, 2012
OncoSec [Member]
Second warrant [Member]
Related-Party Transactions (Textual) [Abstract]                        
Additional shares purchased in VGX Int'l     145,000                  
Sale price per share     $ 0.71                  
Percentage of ownership     16.10%   16.10%              
Payment received for license granted       $ 3,000,000                
Deferred revenue from affiliated entity       3,000,000                
Period over which deferred revenue from affiliated entity will be recognized in years       8 years                
Revenue from related parties         577,000 411,000 381,000 232,000        
Operating expenses related to affiliated entity         871,000 5,300,000 3,400,000          
Accounts receivable from related parties         36,000 20,000     0 18,000    
Payments received from affiliate                 1,000,000      
Additional future scheduled payments from affiliated entity                 2,000,000      
Term of future scheduled payments from affiliated entity                 3 years      
Receivable from related party $ 36,234 $ 38,406             $ 0      
Common stock purchase warrant                     1,000,000 3,000,000
Term of the warrants in years                     5 years 5 years
Exercise price of a five-year warrant                     $ 1.20 $ 1.00