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Summary of Significant Accounting Policies (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Basis of Presentation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net loss from operations | $ (658,751) | $ (6,622,076) | $ (4,133,179) | $ (8,254,949) | $ (5,476,241) | $ (4,541,932) | $ (2,822,159) | $ (2,412,613) | $ (19,668,955) | $ (15,252,945) | $ (17,613,796)
Working capital | 7,600,000 |  |  |  |  |  |  |  | 7,600,000 |  |
Accumulated deficit | (229,760,129) |  |  |  | (210,091,174) |  |  |  | (229,760,129) | (210,091,174) |
Consolidation [Abstract] |  |  |  |  |  |  |  |  |  |  |
Interest in VGX Animal Health | 88.00% |  |  |  |  |  |  |  | 88.00% |  |
Non-controlling interest | 9.00% |  |  |  | 9.00% |  |  |  | 9.00% | 9.00% |
Accounts Receivable [Abstract] |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Long Lived Assets [Abstract] |  |  |  |  |  |  |  |  |  |  |
Impairment of long-lived assets held-for-use |  |  |  |  |  |  |  |  | 0 |  |
Income Taxes [Abstract] |  |  |  |  |  |  |  |  |  |  |
Deferred tax assets, valuation allowance | $ 52,185,000 |  |  |  | $ 44,784,000 |  |  |  | $ 52,185,000 | $ 44,784,000 |

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