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Investments in Affiliated Entities (Details) - USD ($) | Dec. 31, 2015 | Jul. 01, 2015 | May. 31, 2015 | Dec. 31, 2014
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Related Party Transaction [Line Items] |  |  |  |
Percentage of ownership |  |  | 20.00% |
Carryover basis |  | $ 0 |  |
Fair Value, Inputs, Level 1 | Common stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Number of shares owned | 395,758 |  |  |
VGX International |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of ownership | 10.20% |  |  | 10.20%
Plumbline Life Sciences |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Percentage of ownership | 16.90% |  |  |

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