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Related Party Transactions (Details) - USD ($) |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
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Sep. 28, 2016 | May 26, 2016 | Mar. 16, 2016 | Oct. 07, 2013 | Mar. 24, 2010 | Jan. 31, 2016 | May 31, 2015 | Mar. 31, 2012 | Sep. 30, 2011 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | May 31, 2016 | May 31, 2014
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term other assets |  |  |  |  |  |  |  |  |  | $ 2,113,147 | $ 670,833 |  |  |
Ownership percentage by parent |  |  |  |  |  |  |  |  |  |  |  |  |  | 85.00%
Payment of receivable |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |
Future payments to be received |  |  |  |  |  |  | $ 1,000,000 |  |  |  |  |  |  |
Ownership |  |  |  |  |  |  | 16.80% |  |  |  |  |  |  |
Payment of cash distribution |  |  |  |  |  |  |  |  |  | 1,000,000 | 1,000,000 |  |  |
Investment in affiliated entity - PLS |  |  |  |  |  |  |  |  |  | 3,777,510 | 5,045,915 |  |  |
Minority shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of cash distribution |  |  |  |  |  |  |  |  |  | $ 149,559 | 149,559 |  |  |
Plumbline Life Sciences |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of investment |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0
Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares owned |  |  |  |  |  |  |  |  |  |  |  |  | 395,758 |
Available-for-sale Securities | Plumbline Life Sciences |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares owned |  |  |  |  |  |  |  |  |  | 395,758 |  |  |  |
VGX Pharmaceuticals | Available-for-sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares owned |  |  |  |  |  |  | 465,364 |  |  |  |  |  |  |
First warrant | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock purchase warrant (shares) | 50,000 |  |  |  |  |  |  |  | 50,000 |  |  |  |  |
Exercise price of a five-year warrant ($ per share) | $ 24.00 |  |  |  |  |  |  |  | $ 24.00 |  |  |  |  |
Second warrant | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock purchase warrant (shares) |  |  |  |  |  |  |  | 150,000 |  |  |  |  |  |
Exercise price of a five-year warrant ($ per share) |  |  |  |  |  |  |  | $ 20.00 |  |  |  |  |  |
GeneOne (affiliated entity) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |
Accounts payable/accrued liability |  |  |  |  |  |  |  |  |  | $ 379,000 | 165,000 |  |  |
NIAID |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from related parties |  |  |  |  |  |  |  |  |  | 1,200,000 | 450,000 | $ 479,000 |  |
Operating expenses related to affiliated entity |  |  |  |  |  |  |  |  |  | 2,800,000 | 6,900,000 | $ 4,200,000 |  |
Accounts receivable from related parties |  |  |  |  |  |  |  |  |  | 441,000 | 4,000 |  |  |
Long-term other assets |  |  |  |  |  |  |  |  |  | $ 571,000 | $ 373,000 |  |  |
OncoSec | Second warrant |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock purchase warrant (shares) |  |  |  |  |  |  |  |  |  | 150,000 |  |  |  |
Exercise price of a five-year warrant ($ per share) |  |  |  |  |  |  |  |  |  | $ 20.00 |  |  |  |
Director |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related-Party Transactions (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |
Revenue from related parties |  |  |  |  |  |  |  |  |  | $ 341,000 |  |  |  |
Operating expenses related to affiliated entity |  |  |  |  |  |  |  |  |  | 985,000 |  |  |  |
Expenses to reimburse |  |  | $ 3,100,000 |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  |  | 152,000 |  |  |  |
Due to related parties |  |  |  |  |  |  |  |  |  | $ 671,000 |  |  |  |

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