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Related Party Transactions (Details) - USD ($) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 28, 2016 | May 26, 2016 | Mar. 16, 2016 | Oct. 07, 2013 | Mar. 24, 2010 | Jan. 31, 2016 | May 31, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | May 31, 2016 | Dec. 31, 2015 | May 31, 2014
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term other assets |  |  |  |  |  |  |  | $ 1,482,066 |  | $ 1,482,066 |  |  | $ 676,803 |
Subsidiary ownership percentage by parent |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00%
Receivable from sale of intangible assets |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |
Future payments to be received from sale of intangible assets |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |
Ownership of investment |  |  |  |  |  |  | 16.90% |  |  |  |  |  |  |
Carrying value of investment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0
Investment in affiliated entity - PLS |  |  |  |  |  |  |  | $ 4,537,761 |  | $ 4,537,761 |  |  | 5,045,915 |
Available-for-sale Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment owned (shares) |  |  |  |  |  |  |  | 395,758 |  | 395,758 |  | 395,758 |  |
Available-for-sale Securities [Member] | VGX International [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment owned (shares) |  |  |  |  |  |  | 465,364 |  |  |  |  |  |  |
GeneOne Life Sciences [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Milestone-based ownership target |  | 35.00% |  |  |  | 35.00% |  |  |  |  |  |  |  |
Term |  |  |  | 20 years |  |  |  |  |  |  |  |  |  |
Payment received for license granted |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |  |
Deferred revenue from affiliated entity |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |  |
Period over which deferred revenue from affiliated entity will be recognized in years |  |  |  |  | 8 years |  |  |  |  |  |  |  |  |
Revenue from related parties |  |  |  |  |  |  |  | $ 452,000 | $ 113,000 | $ 1,000,000 | $ 338,000 |  |  |
Operating expenses related to affiliated entity |  |  |  |  |  |  |  | 801,000 | $ 1,100,000 | 2,100,000 | $ 6,500,000 |  |  |
Accounts receivable balance |  |  |  |  |  |  |  | 355,000 |  | 355,000 |  |  | 4,000 |
Accounts payable and accrued liability |  |  |  |  |  |  |  | 93,000 |  | 93,000 |  |  | 165,000 |
Long-term other assets |  |  |  |  |  |  |  | $ 619,000 |  | $ 619,000 |  |  | $ 373,000 |
OncoSec [Member] | First warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock purchase warrant (in shares) | 50,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of a five-year warrant ($ per share) | $ 24.00 |  |  |  |  |  |  |  |  |  |  |  |  |
OncoSec [Member] | Second warrant [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock purchase warrant (in shares) |  |  |  |  |  |  |  | 150,000 |  | 150,000 |  |  |  |
Exercise price of a five-year warrant ($ per share) |  |  |  |  |  |  |  |  |  | $ 20.00 |  |  |  |
Director [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Revenue from related parties |  |  |  |  |  |  |  | $ 228,000 |  | $ 228,000 |  |  |  |
Operating expenses related to affiliated entity |  |  |  |  |  |  |  | 329,000 |  | 586,000 |  |  |  |
Expenses to reimburse |  |  | $ 3,100,000 |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  | 39,000 |  | 39,000 |  |  |  |
Accounts payable/accrued liabilities |  |  |  |  |  |  |  | $ 401,000 |  | $ 401,000 |  |  |  |

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