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Goodwill and Intangible Assets (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Apr. 30, 2016
Apr. 29, 2016
Jun. 30, 2009
Jan. 31, 2005
Non-Amortizing:            
Goodwill, Gross $ 10,513,371 $ 10,513,371        
Goodwill, Net Book Value 10,513,371 10,513,371        
Amortizing:            
Intangible assets, Gross 24,717,873 24,717,873        
Intangible assets, Accumulated Amortization (17,495,778) (17,089,479)        
Intangible assets, Net Book Value 7,222,095 7,628,394        
Total goodwill and intangible assets, Gross 35,231,244 35,231,244        
Total goodwill and intangible assets, Net Book Value 17,735,466 18,141,765        
Inovio AS [Member]            
Non-Amortizing:            
Goodwill, Net Book Value           $ 3,900,000
VGX [Member]            
Non-Amortizing:            
Goodwill, Net Book Value         $ 6,200,000  
Bioject [Member]            
Non-Amortizing:            
Goodwill, Net Book Value     $ 400,000 $ 400,000    
Patents [Member]            
Amortizing:            
Intangible assets, Gross 5,802,528 5,802,528        
Intangible assets, Accumulated Amortization (5,636,192) (5,618,854)        
Intangible assets, Net Book Value $ 166,336 183,674        
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 (1,169,048) (1,161,861)        
Intangible assets, Net Book Value $ 154,713 161,900        
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 (6,931,798) (6,825,028)        
Intangible assets, Net Book Value $ 1,174,472 1,281,242        
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 (248,185) (240,264)        
Intangible assets, Net Book Value 87,129 95,050        
Bioject [Member]            
Amortizing:            
Intangible assets, Gross 5,100,000 5,100,000        
Intangible assets, Accumulated Amortization (773,055) (562,222)        
Intangible assets, Net Book Value $ 4,326,945 4,537,778        
Bioject [Member] | Minimum [Member]            
Schedule of intangible assets by major asset class            
Useful Life 2 years          
Bioject [Member] | Maximum [Member]            
Schedule of intangible assets by major asset class            
Useful Life 15 years          
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 (2,737,500) (2,681,250)        
Intangible assets, Net Book Value $ 1,312,500 $ 1,368,750