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Goodwill and Intangible Assets (Details) - USD ($)
 9 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Jun. 30, 2009
Jan. 31, 2005
Non-Amortizing:        
Goodwill, Gross $ 10,113,371 $ 10,113,371    
Goodwill, Net Book Value 10,113,371 10,113,371    
Amortizing:        
Intangible assets, Gross 19,617,873 19,617,873    
Intangible assets, Accumulated Amortization (15,499,863) (14,841,814)    
Intangible assets, Net Book Value 4,118,010 4,776,059    
Total goodwill and intangible assets, Gross 29,731,244 29,731,244    
Total goodwill and intangible assets, Net Book Value 14,231,381 14,889,430    
Inovio AS [Member]        
Non-Amortizing:        
Goodwill, Net Book Value       $ 3,900,000
VGX [Member]        
Non-Amortizing:        
Goodwill, Net Book Value     $ 6,200,000  
Patents [Member]        
Amortizing:        
Intangible assets, Gross 5,802,528 5,802,528    
Intangible assets, Accumulated Amortization (5,482,100) (5,358,433)    
Intangible assets, Net Book Value $ 320,428 444,095    
Patents [Member] | Minimum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 8 years      
Patents [Member] | Maximum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 17 years      
Licenses [Member]        
Amortizing:        
Intangible assets, Gross $ 1,323,761 1,323,761    
Intangible assets, Accumulated Amortization (1,125,926) (1,104,366)    
Intangible assets, Net Book Value $ 197,835 219,395    
Licenses [Member] | Minimum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 8 years      
Licenses [Member] | Maximum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 17 years      
CELLECTRA [Member]        
Amortizing:        
Intangible assets, Gross $ 8,106,270 8,106,270    
Intangible assets, Accumulated Amortization (6,291,176) (5,970,866)    
Intangible assets, Net Book Value $ 1,815,094 2,135,404    
CELLECTRA [Member] | Minimum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 5 years      
CELLECTRA [Member] | Maximum [Member]        
Schedule of intangible assets by major asset class        
Useful Life 11 years      
GHRH [Member]        
Schedule of intangible assets by major asset class        
Useful Life 11 years      
Amortizing:        
Intangible assets, Gross $ 335,314 335,314    
Intangible assets, Accumulated Amortization (200,661) (176,899)    
Intangible assets, Net Book Value $ 134,653 158,415    
Other [Member]        
Schedule of intangible assets by major asset class        
Useful Life 18 years      
Amortizing:        
Intangible assets, Gross $ 4,050,000 4,050,000    
Intangible assets, Accumulated Amortization (2,400,000) (2,231,250)    
Intangible assets, Net Book Value $ 1,650,000 $ 1,818,750