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Goodwill and Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2013
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, 2013 |  | December 31, 2012
| 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 |  |  | (4,926,854 | ) |  | 875,674 |  |  | 5,802,528 |  |  | (4,852,673 | ) |  | 949,855 |
Licenses | 8 – 17 |  | 1,323,761 |  |  | (1,054,057 | ) |  | 269,704 |  |  | 1,323,761 |  |  | (1,046,870 | ) |  | 276,891 |
CELLECTRA®(b) | 5 – 11 |  | 8,106,270 |  |  | (4,636,622 | ) |  | 3,469,648 |  |  | 8,106,270 |  |  | (4,334,234 | ) |  | 3,772,036 |
GHRH(b) | 11 |  | 335,314 |  |  | (121,452 | ) |  | 213,862 |  |  | 335,314 |  |  | (113,531 | ) |  | 221,783 |
Other(c) | 18 |  | 4,050,000 |  |  | (1,837,500 | ) |  | 2,212,500 |  |  | 4,050,000 |  |  | (1,781,250 | ) |  | 2,268,750 |
Total intangible assets |  |  | 19,617,873 |  |  | (12,576,485 | ) |  | 7,041,388 |  |  | 19,617,873 |  |  | (12,128,558 | ) |  | 7,489,315 |
Total goodwill and intangible assets |  |  | $ | 29,731,244 |  |  | $ | (12,576,485 | ) |  | $ | 17,154,759 |  |  | $ | 29,731,244 |  |  | $ | (12,128,558 | ) |  | $ | 17,602,686 |
(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 contracts and 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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