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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2014
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, 2014 |  | December 31, 2013
| 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 |  |  | (5,189,911 | ) |  | 612,617 |  |  | 5,802,528 |  |  | (5,128,227 | ) |  | 674,301 |
Licenses | 8 – 17 |  | 1,323,761 |  |  | (1,082,804 | ) |  | 240,957 |  |  | 1,323,761 |  |  | (1,075,617 | ) |  | 248,144 |
CELLECTRA®(b) | 5 – 11 |  | 8,106,270 |  |  | (5,650,556 | ) |  | 2,455,714 |  |  | 8,106,270 |  |  | (5,543,786 | ) |  | 2,562,484 |
GHRH(b) | 11 |  | 335,314 |  |  | (153,136 | ) |  | 182,178 |  |  | 335,314 |  |  | (145,215 | ) |  | 190,099 |
Other(c) | 18 |  | 4,050,000 |  |  | (2,062,500 | ) |  | 1,987,500 |  |  | 4,050,000 |  |  | (2,006,250 | ) |  | 2,043,750 |
Total intangible assets |  |  | 19,617,873 |  |  | (14,138,907 | ) |  | 5,478,966 |  |  | 19,617,873 |  |  | (13,899,095 | ) |  | 5,718,778 |
Total goodwill and intangible assets |  |  | $ | 29,731,244 |  |  | $ | (14,138,907 | ) |  | $ | 15,592,337 |  |  | $ | 29,731,244 |  |  | $ | (13,899,095 | ) |  | $ | 15,832,149 |
(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=14024403&loc=d3e13816-109267 + Details
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