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Related Party Transactions (Details) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Mar. 24, 2010
VGX Int'l [Member]
Jun. 30, 2013
VGX Int'l [Member]
Jun. 30, 2012
VGX Int'l [Member]
Jun. 30, 2013
VGX Int'l [Member]
Jun. 30, 2012
VGX Int'l [Member]
Dec. 31, 2012
VGX Int'l [Member]
Jun. 30, 2013
OncoSec [Member]
Sep. 28, 2011
OncoSec [Member]
First warrant [Member]
Mar. 24, 2012
OncoSec [Member]
Second warrant [Member]
Related-Party Transactions (Textual) [Abstract]                      
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       106,000 106,000 213,000 213,000        
Operating expenses related to affiliated entity       103,000 138,000 558,000 328,000        
Accounts receivable from related parties       0   0   36,000      
Payments received from affiliate                 2,000,000    
Additional future scheduled payments from affiliated entity                 1,000,000.0    
Term of future scheduled payments from affiliated entity                 3 years    
Receivable from related party $ 0 $ 36,234             $ 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