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Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Apr. 30, 2016 | Jun. 30, 2009 | Jan. 31, 2005
Indefinite lived: |  |  |  |  |
Goodwill | $ 10,513,371 | $ 10,513,371 |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | 24,717,873 | 24,717,873 |  |  |
Intangible assets, Accumulated Amortization | (21,024,022) | (19,957,728) |  |  |
Intangible assets, net book value | 3,693,851 | 4,760,145 |  |  |
Total goodwill and intangible assets, Gross | 35,231,244 | 35,231,244 |  |  |
Total goodwill and intangible assets, Net Book Value | $ 14,207,222 | 15,273,516 |  |  |
Inovio AS |  |  |  |  |
Indefinite lived: |  |  |  |  |
Goodwill |  |  |  |  | $ 3,900,000
VGX |  |  |  |  |
Indefinite lived: |  |  |  |  |
Goodwill |  |  |  | $ 6,200,000 |
Bioject |  |  |  |  |
Indefinite lived: |  |  |  |  |
Goodwill |  |  | $ 400,000 |  |
Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 11 years |  |  |  |
Patents |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 17 years |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 5,802,528 | 5,802,528 |  |  |
Intangible assets, Accumulated Amortization | (5,802,528) | (5,742,079) |  |  |
Intangible assets, net book value | $ 0 | 60,449 |  |  |
Patents | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 10 years |  |  |  |
Licenses |  |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 1,323,761 | 1,323,761 |  |  |
Intangible assets, Accumulated Amortization | (1,248,104) | (1,219,357) |  |  |
Intangible assets, net book value | $ 75,657 | 104,404 |  |  |
Licenses | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 10 years |  |  |  |
CELLECTRA |  |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 8,106,270 | 8,106,270 |  |  |
Intangible assets, Accumulated Amortization | (8,106,270) | (7,679,190) |  |  |
Intangible assets, net book value | $ 0 | 427,080 |  |  |
CELLECTRA | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 8 years |  |  |  |
GHRH |  |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 335,314 | 335,314 |  |  |
Intangible assets, Accumulated Amortization | (335,314) | (303,630) |  |  |
Intangible assets, net book value | $ 0 | 31,684 |  |  |
GHRH | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 11 years |  |  |  |
Bioject |  |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 5,100,000 | 5,100,000 |  |  |
Intangible assets, Accumulated Amortization | (2,175,556) | (1,882,222) |  |  |
Intangible assets, net book value | $ 2,924,444 | 3,217,778 |  |  |
Bioject | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 12 years |  |  |  |
Other |  |  |  |  |
Definite lived: |  |  |  |  |
Intangible assets, Gross | $ 4,050,000 | 4,050,000 |  |  |
Intangible assets, Accumulated Amortization | (3,356,250) | (3,131,250) |  |  |
Intangible assets, net book value | $ 693,750 | $ 918,750 |  |  |
Other | Weighted Average |  |  |  |  |
Schedule of intangible assets by major asset class |  |  |  |  |
Intangible asset, useful life | 18 years |  |  |  |

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