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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of intangible assets by major asset class | The following sets forth the goodwill and intangible assets by major asset class:
|  |  | March 31, 2016 |  | December 31, 2015
| Useful Life (Yrs) | Gross |  | Accumulated Amortization |  | Net Book Value |  | Gross |  | Accumulated Amortization |  | Net Book Value
Non-Amortizing: |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill(a) |  |  | $ | 10,113,371 |  |  | $ | — |  |  | $ | 10,113,371 |  |  | $ | 10,113,371 |  |  | $ | — |  |  | $ | 10,113,371 |
Amortizing: |  |  |  |  |  |  |  |  |  |  |  |  |
Patents | 8 – 17 |  | 5,802,528 |  |  | (5,547,536 | ) |  | 254,992 |  |  | 5,802,528 |  |  | (5,516,122 | ) |  | 286,406 |
Licenses | 8 – 17 |  | 1,323,761 |  |  | (1,140,300 | ) |  | 183,461 |  |  | 1,323,761 |  |  | (1,133,113 | ) |  | 190,648 |
CELLECTRA®(b) | 5 – 11 |  | 8,106,270 |  |  | (6,504,717 | ) |  | 1,601,553 |  |  | 8,106,270 |  |  | (6,397,947 | ) |  | 1,708,323 |
GHRH(b) | 11 |  | 335,314 |  |  | (216,502 | ) |  | 118,812 |  |  | 335,314 |  |  | (208,581 | ) |  | 126,733 |
Other(c) | 18 |  | 4,050,000 |  |  | (2,512,500 | ) |  | 1,537,500 |  |  | 4,050,000 |  |  | (2,456,250 | ) |  | 1,593,750 |
Total intangible assets |  |  | 19,617,873 |  |  | (15,921,555 | ) |  | 3,696,318 |  |  | 19,617,873 |  |  | (15,712,013 | ) |  | 3,905,860 |
Total goodwill and intangible assets |  |  | $ | 29,731,244 |  |  | $ | (15,921,555 | ) |  | $ | 13,809,689 |  |  | $ | 29,731,244 |  |  | $ | (15,712,013 | ) |  | $ | 14,019,231 |
(a) | Goodwill was recorded from the Inovio AS acquisition in January 2005 and from the acquisition of VGX in June 2009 for $3.9 million and $6.2 million, respectively.
(b) | CELLECTRA® and GHRH are developed technologies which were recorded from the acquisition of VGX.
(c) | Other intangible assets represent the fair value of acquired intellectual property from the Inovio AS acquisition.

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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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